OBF claim logged refusing to cancel my 7 day old contract

I don't even know why this company is still around. I took a contract on Monday and the noticed that the phone was glitching on wednesday, when it happened on Thursday again i was able to record the glitching and the volume went from low to high during a phone call. I went into the store I received the phone on Thursday. They updated the phone and my whatsapp instore advised to monitor the device. The next day the volume was moving up and down on the device again and there was an error that popped up on the device about notifying Xiaomi about the android services stopping. They advised that they will send an email to cancel the contract. I was debited R461.99 the Saturday after they completed the OBF claim and sent the file to Head office. I called the cancellations department who advised that i am within my 14day cooling off period to cancel but I need to go into the store where Rochelle the alleged manager at Tygervalley (who is never present in the branch) Colleen Wilson and Anthea are refusing to process my cancellation advising that I need to wait for the outcome of the OBF claim. The consumer Protection act says that the consumer gets to choose the action when the device is faulty within a certain time frame so how can such a big corporation go against a consumer right as per Section 56. They need to really be held accountable. Really leaves a bitter taste in ones mouth when 10 different people are saying 10 different things