Terrible customer service!!

The Play energy drink has a promo where if you buy 2 @ the price of R31 you get a R25 Musica voucher. I visited Musica store in Worcester (Mountain Mill) to redeem my vouchers so I could by an Album. The guy who helped me at the counter did not know anything about these vouchers & how they could be redeemed. He then went to the manager of the store to inquire about this. The store manager had no clue of such & did not seem wanting to find out either. The guy who helped me 1st took it to his liberty to call other branches to find out about these vouchers & he was informed what he needed to do. He was also informed that the 6th of April 2015 was the last day for me to redeem the vouchers. He then referred this to his manager because this had to be done at the back office. The store manager told me that I had to wait for him to finish cashing up. I waited for almost an hour standing around in the store like a fool who doesn't know what he was looking for. I asked the guy to check on his manager again & the manager said he was still busy. The store closed at 5pm & I was still standing inside waiting for the manager until I decided I could not wait anymore & I left with no joy at all