Bumper to Bumper beware

I purchased items of total R5143 one of the item is wrong I returned it for the right item but only to charge me 10% and the item I returned was never opened or used still in original packaging even though its within 24hrs they insisted taking 10% from my money and it's not the first time they did that and numerous complaints from other customers. The manager said immediately customers left their premises they'll charge 10% and bragging about it. And they don't supply parts with Vin number to make sure it's the right parts. People should be careful of bumper to bumper they're taking customers for granted even the manager said he doesn't care about consumer protection acts.