I have a picture, but I can't post it

Compared to my aligners, the retainers look like a poorly made product. The aligners were cut nicely around the gums. The retainer is about 2 times the height of my last aligner, and the excess plastic on the bottom presses hard on my lower jaw gums.
I thought of using my last set of aligners instead, but I have "flossable" bonded retainers as well, and they do not fit anymore. What should I do?