Bad service and product

I got an new device which speaker was faulty which i returned within 7days just to be informef that the devic needs to be sent in and if its faulty it will be replaced. This is absurd ! After 5 days with no feedback i contacted the store - still in processing. I wished i cancelled my contract with vodacom all and all i have never had a device or service problem. But when it comes to paying i am sure ill get my acc with no phone.