Gelmar don't know nothing...

My fiance recently went to gelmar to buy the sink strainer... On asking the sales assistant for one that will fit an old sink, the sales assistant said the standard one will fit most definitely, when he got home he tried to see it it would fit it didn't... Now you tell me who's dam fault is that... My fiance clearly said that he wanted a size for the old sink and everyone knows the older sink and what drain it has... So when my fiance went to return it they said they can't because it's out of its packaging... Again who the ****s problem is that if the sales guy is a Dom idiot and doesn't know what an old sink is... For **** sakes...so they refused to return it... Pathetic I must say