vodacom ****med me into a contract and took their phone back.

I took out a contract with Vodacom liberty midlands mall branch in March, in May the phone stopped working so I took it back to them for repairs, on the 16/05/2021 they told me to wait 7 working days and the phone will be repaired. After 14 days when I went back they told me the spares arrived on the 26th I must wait another 7 days for the phone to be repaired. when I go to the branch I am given the run around and all sorts of numbers to call without anyone helping me. I went to the branch and I waited 45minutes for someone to help me to no avail. When I call the Vodacom call centre they tell me that they have no idea what I am talking about and there is nothing on their system but somehow they have handed me over to collections because I am in arrears. I absolutely cannot understand how a huge company like Vodacom can fail to assist me with a simple query, I had the phone for less than a month. despite the fact that I have written proof of everything that has been communicated to me nobody can help me. I am paying for a phone that hasn't been in my possession for almost 2 months now. All I want them to do now is cancel that contract so I can go on with my life.