R1000.00 for Streetwise 2

I was charged R1000.00 for buying 2 x  streetwise 2's a krusher & 3 cones... upon noticing and going back to the store they admitted to having made a mistake... unable to contact or get hold of the manager they said i must come back the next day if the money doesn't reflect...so i did..still no sign of the manager or store owner.. again they said i must come back with my bank statement reflecting no reversal!!! is this a food outlet or a get rich quick scheme???? service sucks