Normal trimmimg for crepe myrtles
 

Cutting crepe myrtles to the stubs is a normal trimming procedure. Most people cut them every year in February. I have 3 of them that I cut every year. Don't worry. They come back fast and thicker with more flowers each time it is done. They will be just as tall as before in no time once the growing season starts next month.

Murdered Crepe Myrtle
 

My first year I made them promise not to cut mine back. Then some weeks after my neighbors' trees started growing back theirs were full and healthy and mine looked puny. It usually takes warm weather to start the regrowing and you'll see the difference. Don’t panic, you will see the value sooner than you think.

According to UF class
 

The proper way to trim crepe myrtles is to only "up the canopy". Triming lower branches only. This helps to provide the shade tree that you can enjoy in your yard. "Knuckling" the tree the first time let alone every year to any tree is awful and incorrect.

I would bet that greater than 90% of privately owned crepe myrtles are cut back every late winter in The Villages. I murder mine only to see them come back more lush than before. The only thing I can say is do nothing and enjoy them this summer.

This is what many do when pruning them so your landscaper likely thought they were just doing their job. Actually, it is NOT the correct way to prune crepe myrtles. It will come back, but if you keep doing it you may not get the desired result long term. As someone else noted, the TV landscapers do not do this. Please read:
Stop Crape Murder: Don’t Cut Back Your Myrtles : NorthEscambia.com

That's the way it is to be pruned. This is the time of year to trim.

They are always supposed to be cut back like that!! It will come back with all its glory this spring!!! If you look at the crepe myrtles all around they are all cut back!!! Read on the internet that is exactly what should be done!!!👍👍

The tree will be fine. Many people cut them this time of year. No need to replace it. It will be good as new by blooming time.

Yes, I did read on the internet, and this way of pruning is wrong!

Google "How to prune a crepe myrtle". I read every article on the first page, and they all say the same thing: Do NOT cut it back like this. Simply cut out any crossed branches or suckers, or any weak, thin branches inside the canopy. You will have a beautiful, graceful tree with lovely blooms.

I wish that when landscapers see that a crepe myrtle has not been previously hacked, they would ask before touching it. Or better, ask when they begin a contract with a homeowner.

Our landscaper did the same thing as happened to the OP. I am furious.

Why do people think one type of pruning is "wrong" vs. another? Who can say what is wrong or right? It's a plant---do what you want.

Crape Myrtle trimming
 

B4 coming to FL, we lived in GA for 2.5 years. We had 7 Crapes in our large back yard. Come home from work one day and found what you found. Chewed out my trimmer. He told me they's come back better than before. they did. If you want standard 6'-10' crape that's what you'll get and you're going to love it. If you want a 18'/24' ugly crape don't cut them back. Come to my street where I can show you both types.

Just to clarify these are crepe Myrtle you're talking about not crape myrtles, Which are nothing but glorified weeds.

You will thank your trimmer in a few months. May look butchered now but Short of agent orange this tree will come back and thrive with beautiful lush foliage and long blooming flowers.

Not true it will never be as good as new. It will live but never look as nice. There is a reason it is called crape murder and the tree should not be trimmed this way.

The master Gardner’s say that is not the way to trim this tree. Yes you can trim it any way you like but that does not make it right.