Bad Service

On 01-01-2016, I want to spar tops to buy a two liter coke and a bottle of water. The consultant there gave me a briken ten rand which i did not notice. Then i proceeded to spar to buy meat the n the consultant advised that they wont accept the broken R10,which to me it was suprising because i got that R10 from one of their store. They refused to assist me, the answer i got was it is not their problem, manager at tops spar must sort it out not them. I was puzzled as i was at spar and went to one of their stores to buy. They also said the drop save does not alow that kind of cash, wish to me it was irrelevant as it is internal matters. Am very dissappointed at the level of service i received and the answers i received from management, if that is how spar treat their customers then i rather buy somewhere else where my money will be appreciated.