Terrible Service from Samsung Buy and Get Promotional Team

Terrible service from Samsung Buy and Get Team. Registered my appliance via the whatsapp and followed all the instructions. 2 weeks later no replies. I contact them again on whatsapp. They now want a picture of the serial number on the unit. The one I sent was on the packaging not on the unit. I am now on holiday so am unable to get that picture. I told them this and Dillan the whatsapp assistant said he will check how we can resolve it and get back to me. He never came back to me. Then a few days later, after trying the wahtsapp chat day after day, they tell me the invoice is not clear. This was never a problem initially. I get a new invoice emailed from the store to me and send it through. Then the problem according to Warda the whatsapp assistant is that the invoice is in my wifes name. Now they want my wife to redo the entire application. I tell them I can get it in my name but they now still want the picture of the unit even though I'm on holiday. I was never requested to send it through when I initially did the application and was at home. I asked that someone call me to discuss but they just ignore that request. Terrible service from the team running this promotion.