So tired of this issue

i lodged a complaint against Edgars after I bought a Bad Boy watch in December 2014. i had to return the watch 3 times for repairs. on Friday i've received a phone call from Tshepiso advising me that i can come to the Edgars store to slect a new watch. Today i went to the store to select a new watch, Tshepiso was not at the store, so Takalani helped me, she refunded me the R250 i paid for the original watch, but since they didn't have the same watch or a watch in that price range, i had to pay in another R250 as the replacement watch is R499. I complained that i had to pay in, since they sold me a watch that had to be send in for repairs 3 times and now i have to pay in just because they don't have the same watch or a Bad Boy watch in that price range. i was advised that that is the returning policy as i didn't have the original slip...EDGARS, YOU have the receipt of the purchase which i had to hand in with the first attempt of the repairs. so just because you sold me a dud watch to start with, it have now cost me double