Is my orthodontist just ripping me off?!

Is my orthodontist just ripping me off?

I had braces in high scho. and paid in full at the begin. of treatment for two years that was expected. My ortho. ended up taking my braces off early--as I went to the dentist the follow. day after having them removed and my dentist said my bite was off and called my ortho. and said my treat. was not over--The first time that they were remov. I was given a plaster mold of my teeth I assume to make a copy if lost. After treat. the second go around I was not given this plaster mold--I wore my retainer periodic. up until now and if it was tight I would just wear it a week straight--and it would fit fine. I lost my retainer not long ago and asked for a copy of the original retainer--he said it was in storage and that it would not work to make a copy anyway--but I've moved my teeth before just fine back. He wanted to put braces back on-I said no way--then he said I should try the invisible retainer retainer that you gradually move-

Is this true or is he just trying to rip me off?

If they look nice,and the bite is not so far off that it bothers you, then I would choose to leave them alone. That's just me, but after 4 years of braces, molds, retainers and money, I just went for the look. I didn't care if the back teeth weren't perfectly in line.