I wanna settle my account but not the R11000

I fell behind last year July / August with my payments and tried to contact your contact centre several times requesting an account number that I could pay into in bringing my account up to date. I indicated though that i could only settle my outstanding amount in two instalments. On so many occasions I was told there is no such account. I eventually gave up hoping someone will call me to make payments arrangements. No one called me. Next thing my line was cut but from the R5000 that I was behind with in August, my balance has shot up to R11000. I get a call from some attorneys wanting to debit my bank account to settle this R11000. I refused because I told them I don't owe Vodacom R11000, that's over and above the fact that Vodacom debited my account on two occasions for about R1400 each month, which I allowed because I did not want to be blacklisted, so knowing I owed them - I thought this would propel someone from their collections department to call me so that we can agree on a payment agreement. Nothing happened then in December I reversed a debit order from Vodacom hoping that will get them to call me, still nothing. Until the lawyers called me last week.