No feed back

I bought a Blaupunkt tablet for my son on 8/04/2015, order no ***. It never worked. I returned it and was given a new unit.<br> On 31/08/2015 my son told me it would not charge. I returned it on 04/09/2015 and was told I would have a new unit or a replacement by 07/09/2015.<br> To date no-one has bothered getting back to me. My partner called on 17/09/2015 and spoke to Annette who said the charger was faulty but they had NOT checked the unit itself. I checked the unit before I took it back and it was the unit that would not charge. She said she would get back to us before the end of the day.<br> STILL NO REPLY!<br> It has been over 2 weeks now. Can somebody please tell me what's going on.