In reply to O'Donopoo:
Only time I've returned an item to Go it happened to be shoes and it took about four weeks turnaround. Then, they said they had to go to their HQ first.
BTW some large companies don't actually return items to distributors/manufacturers right away anyway as they wait till the distribution representative visits first to check. With Go I wasn't needing to wait for a return or replacement so when the store got back to me agreeing they were faulty, I just opted for a refund which they gave.