Payment done at the store put me in errears

I am so displeased by the service at Vodacom store in Umlazi megacity.i bought 2 phones by contract and paid an amount on the 20th April 2023 of 835.now I'm in errears.i have went to the store 3 times to be assisted with logging in payment and still no help.i have phone and email *** 3 times but my payment is still not sorted.im so angry that I feel Vodacom as a whole will loose me as a customer which I have been for many years.