Clearing my name from ITC

I took a contract with Vodacom on the 11th of May 2018, failed to pay the account due to financial challenges. The account was handed over to several companies whereby I tried to pay a little but that was not enough. In January 2023 when i wanted to buy a house the application was declined and was advised to contact TSL legal. Then i contacted TSL legal to request a settlement letter which was provided. I then submitted it to another company for consolidation to try to clear my name. I was told that the application was declined because at the ITC it has been loaded as if the installment, Arears and balance is R 34 252.44. Even those contract cellphones are blocked. Please assist on clearing my name.