Multichoice Overcharging me on what i didnt sign for

Good day MultiChoice, I had took up the price lock of R649 which they sand the Installer to come to my house on the 26 November 2021. On the 30 November, they debited me R1493 and when i make a call they said they are sorry, the urgent added another decorder on my account by mistake. therfore they will fix it and refund me. Refund never happen. On the 31 December they debited me again R1493 and when i call they said someone added a decorder on my account using self services. and they said they will escalate and someone will call me.. No one called me, untill i call again and they said they are still investigating and as from beginning January till now. On the 31 January they debited R1593 and they said the are still investigating and it shows that the Installer had added the decorder using Installer app however they cant remove it because they are still investigating and someone will call me and no one called me. On the 1 February the lady by the name of Portia Phiri called and said she will remove it and fix my account and will get a refund of my money. After she dropped the call nothing happened and still the decorder is activated again today on the 2 February 2022. I even went to Edenvale Branch and they said they are escalating it and still nothing is happening even today.