Vodacom I have no data and debit orders went through

I have a data sim only contract since 2019 paid by debit order. July I switched banks and informed Vodacomto arrange for new debit order, the rep**** and undertook to do this by August, my data was switced off. By August they failed to submit the new debit order September I made arrangement to pay all arrears by debit order, the now much higher agreed amount was honored October 2020 November 2020 and December 2020 They never activated my data since July I called customer care believing they would and was informed no payments shows on their sistem so where did almost R1700.00 go for past 3 months because I did not use any of it. I have all bank statements and corrospondence with Vodacom