Non existent customer service!!!

Once again Vodacom!!!!! I cancelled my debit order with Vodacom earlier this year and advised them that I would rather EFT every month as I continuously had my account debited with different amounts every month which took months to rectify and account was credited. Once cancelling the debit order I never received any invoice. I myself had to phone in to ask invoice to be e-mailed to me. So I have thumb sucked amounts. Last week I received a call from Vodacom and asked the lady to please tell my why I am not receiving any invoice/ statements, she became aggressive with me and and would not listen to my query..."why am I not getting invoices" anyway she put the phone down on me. Since then I get may 5 to 8 calls per day and when I answer it rings for about a minute longer and then cuts off. I want a statement e-mailed to me every month. I made a payment today which I thumb sucked. Please also advise me what is owing on this account as I would like to settle the full balance. I have had continues issues with this particular contract over the years and would like to now cut my losses and finish with Vodacom once and for all. NB in the beginning of 202 0 I even called in to advise that I would like to change my banking details as there was ***** on my one account...No one even bother to update the new banking details..I am done with Vodacom DONE!!!!!!!