This is why buying all your dive equipment from a reputable LDS is the way to go. You take your wetsuit to the place you bought it, and THEY get the manufacturer to take care of them, then the LDs gets you a new suit in return. A mail order house is going to ignore you.
Some of the 3mm suits don't hold up at all to abrasion.
Send the suit directly to the manufacturer if you didn't buy it from a store, or go into a LDS, but a decent ticket item, then talk to the owner and see if he or she can help