Nasty Invoice from Vodacom

Once again Vodacom has left me at a loss of words!! After it took over a month to process the relocation of my fibre, Vodacom then decideds to surprise me with a disturbing invoice of R2000 for my fibre account. The invoice included a pro rata amount of R480 even though I was charged for a full month at my previous address for the fibre line that vodacom did not cancel in time. The invoice also included an amount of R953 for a balance of contract at my previous address, that Vodacom did not bother to mention to me, telephonically or in writing, even though I spoke to them on numerous occasions to get my repocation processed. I am not liable and will not pay these additional invoice amounts for Vodacoms failings. I called through to the fibre customer care on two occasions and sent them an email over a week ago to query and dispute this, but as always Vodacom has not bothered to respond as yet. This is my last resort to get assistance! (SR***) - this query. (SR***) - relocation request.