You should edit your post if you can to mention that its a C-Corp. From what I know the C-Corp should be protecting you from personal liability, but I'm sure other commenters here have more expertise
Just for reference: The C-Corp does provide a pretty heavy liability shield. However, alot of these contracts where likely personally guaranteed. It's nearly impossible to open a merchant account for a young company without personal guarantees from the principles. The lawyer likely required personal guarantees on the retainer as well.
It's part of doing business really. Creditors really don't like corporate protection (for obvious reasons) so it's pretty easy to get yourself into a situation that they're seeing... although the high number of charge-backs is something of a head scratcher.