Billed after im told no charge and after 9 months

In March last year I reported my issues with Ingram Micro and after many emails and calls finally got a call from a manager who apologised and assured me my phone will be repaired at no cost to me and I will receive it in 3 weeks. I was relieved that my problem was solved my phone was repaired at no cost to me. But after 9 Months I get debited for over R2000.00 without any warning when I queried via email I was told for repairs carried out to your phone in march I sent a email stating that ingram micro assured me that I will not be liable for repair cost no reply I sent another email no reply, I reversed the money still no contact with me. Then finally I get a sms Threatening my service will be canceled and it will reflect on my credit record.