Poor call center feedback

So its been about 8 years if not more i have been with Vodacom and had few hick ups but Vodacom at times would refund or give free data. Anyway im cancelling and changing to a different network due to the BAD SERVICE just received by a lady named Faniswa from the cape town (ref ***). my question was why after so many years This month im have to by sooo much additional data. her response was because i used the data???? yet i initiated the query by stating i have been using the found EXACTLY the same as i have previously. anyway suggestion is fire her or loose more customers. but i also want proper feedback as to why my data has been used and refund