Had a vodacom contract that is a wack

We bought a laptop nd pocket wifi via contract with vodacom they were takin their money via debit oder I left for work going to drc last year April everythin was fine until 2020 Jan their debit oder stopped takin wch I wondered why and I couldn't call cause I was deployed in drc since July 2019 till October 2020 I could do any credit or what so ever because of vodacom yelling me I owe them 5000 now I'm blacklisted and taken to lawyers bcos of their own doings I did my stuff all debit oders for a reason vodacom contract is a wack