change to A PACKAGE I DID NOT REQUESTED

On the 23rd june 2020 I contacted cell c for an upgrade to the 200gig (100gig day and 100gig night) package as advertised on the June monthly deals booklet on my *** contract i spoke to Trish in the upgrade department advised her that I am currently on 100gig anytime data pakage on a month to month contract as I was waiting for fibre to be installed in my area for more than 2 years and would like to change to the 200gig since fibre is not yet available in my area and then advised that she will need to take my account to credit vetting to complete the upgrade process and would callme as soon as response received. More than two hours later Trish called to advise that credit vetting did not approve the upgrade. INSTEAD SHE CHANGED MY PAKAGE TO A TOP UP 500MG OF DATA NOT WHAT I REQUESTED. When questioned about why the change to A PACKAGE I DID NOT REQUESTED, i asked to speak to her supervisor Hassim who promised to call me back and to tthus day i have not been contacted. Contacted cell c to reverse the downgrade as I did not reauest to be downgraded.. And received numerous reference numbers with no assistance. I have since received an sms for a monthly bill for two thousand plus rands and if i could not change to a package for R599(five hundred and ninety nine) from R470(four hundred and seventy) how does their credit vetting work. I WANT to remain on my package that i have been on or cancel my contract as for the two thousand rand bill i will not pay Someone from cell c who knows what they are doing needs to contact me