Faulty Samsung Galaxy Tab - Bad Customer Care

Customer Care Query #*** - I have been trying for over two weeks to get assistance with MTN Online to collect my faulty tablet which I've only had for two weeks. I called mutliple time and most of the consultants tell me that I called the wrong number only to give me the same number I dialled to get through to them in the first place. I finally spoke to someone from MTN Sales/Upgrades who could pick up that I took the contract through their department and told me she would escalate the query and someone will be in touch to arrange collection. I am still waiting. I keep getting emails to drop off the unit with original paperwork, which is not possible due to everything being done online/telephonically. All I want is a working tablet. I can't take to off work because MTN sold me a faulty unit. Would appreciate some decent service and a proper response. Thank you.