Just Aweful

So, on Thursday i phoned to upgrade and was told there upgrade department is closed during this period which makes no sense to me due to online sales being allowed now, and that I was to go into a branch. Today, Saturday 23/05/2020, i went into their branch at Lakeside Mall Benoni. After showing me phones and a tablet I decided to upgrade to the Samsnung A51. The lady behind the desk then said to me that I would have to downgrade to a top up plan and have I ever used top up before. I then told her to forget it and I walked out the shop. At no stage did she try and ask if I wanted to look at other phones, maybe cheaper, she just accepted me walking out. On my home, I was now 20kms away I get a phone call by the lady who dealt with me saying I misunderstood her. How does one misunderstand "with this phone you will have to go onto top up, have you ever used top up before"? She apologised saying she maybe put things across wrong. She said can I go back and they will upgrade me with the phone I wanted. I had already driven 25kms there and was 20kms away. I explained that I will be cancelling the contract and put the phone down. There are 2 points to this review, 1) why has Cell C closed their upgrade department, I assume they will say for safety reasons but why then must the public go into a mall scattered with people to upgrade and 2) how is it possible that after spending 10's of thousands of rands with them, having never ever missed a payment, I am told I have to go onto top up plan? I am going to give Cell C 3 months notice to cancel this contract and will never ever deal them again. I currently have another contract with them and when that comes to an end I will be cancelling that as well.