You can absolutely fix this yourself. Don't be mad; all of us have pulled a boner or two with our RVs we've wished we'd never done...
Is the trim piece (I assume you mean the corner piece that covers the top of the sidewall and the edge of the roof) still intact?
What you'll need to do is remove the trim piece and either straighten it or replace it.
Getting up on the roof, and using a good quality elastomeric sealant (not silicone) fill up all the old screw holes where the screws ripped out.
Order some
Eternabond double sided tape; lay down a strip of tape wide enough to cover the area that the trim piece covered, then place the trim piece over the tape, ( don't try to match the trim up to exactly where it was before), drill new holes and insert new screws (stainless steel, by preference). Tighten the screws enough to compress the Eternabond tape for a good seal.
While you're up on the roof, check the trim around the other side as well- you may find loose or missing screws which you should caulk and replace.