Poor Service from Providers

Received a new laptop 10 days ago and could not get it loaded, went to Vodacom Beacon Bay on Friday only to be told that Windows 10 has crashed, I need to take it to Vodacom Vincent Park to be sorted out. Go to Vincent Park and told I have to phone a number and they may come to the house or try and sort it out on the phone. I just can't anymore. Now I must pay 3 years for something that already gives trouble on opening the box. I ideally would prefer to cancel the contract and just use my old laptop that has never given a days problem.