No matter where you buy gold jewelry - here at the Q, in a major department store, from a jewelry artist at a show, from a major jewelry shop such as Tiffany, you could need repairs.
I don't remember what the deal is with Imperial Gold as far as warranties, but if there wasn't one, any good jeweler can make repairs. Just be sure you get an estimate before you authorize the work. Jewelry repair can be very expensive depending upon the materials needed and the amount of skill as well as the amount of time.