Vodacom Bad servive

I was due for an upgrade so in November I went to Vodacom Musgrave .I explained my financial situation to them as I needed to down grade my red contract to cut costs.They offered my 150 min and data with a huawei p30 pro cell phone for R 700 pm which I agreed to , There computer system said that I had to wait for 24 hours for confirmation from Vodacom as the phone had to be financed , So I waited and waited and waited . Around the 28 November as I had heard nothing at all I went back to Vodacom at Musgrave center only to be told that , they are still waiting for feed back from vodacom about my new contract , and it will take another 24 hours !! On the 1 December I went back to Vodacom Musgrave only to be told that my new contract had been DECLINED due to negative accounts . All I wanted was to reduce the cost of my Vodacom account as it was no longer cost effective .I received no feed back , sms at all , so now I have November Vodacom account of R 1171.00 and as it is now a new month December Vodacoms account to settle another R 1171.00 and what is even worse the vodacom signal where I stay is extremely bad . The sales person at Musgrave Vodacom told me that I have the highest customer rating of 700 !!! Vodacom black listed me for none payment ...I had a big dispute about my account and when I asked why they had black listed me with the credit beuro , they rep**** that I had not agreed to a payment plan ,they said I owed them R 12000 and in the end all I owed and paid was around R 3600 ,,I WAS STILL BLACK LISTED . So now what is Vodacom going to do !!! Lets wait and See.