Bad serives from makro vaal

We Purchage a vacuum cleaner from Makro in vanderbijlpark in October last year. Had it for a week and it pop. Went back to makro gave it back and they said it must go in for repairs wil take up to 6 weeks. Got it back and again it pop. Took it back again i told the lady i want my money back she said no the supplier of the vacuum cleaner wil deside if they will refund us or give us a new one. Once again 6 weeks. Got it back again and it poped again. I phoned the store about 6 weeks ago regarding this spoke to the Manager and till today not one person from makro phoned me back. I want my money back they can take that vacuum back i dont want it