BAD SERVICE FROM VODACOM - FAILURE TO REFUND MONEY

I am very disappointed that after ten (10) months of a run around Vodacom has to date not even scratched the surface to resolve my query. Two payments were made to Vodacom in respect of my contracts. They had received one payment but conveniently had not received the one that was done on the mobile App. So what is the purpose of that App? I have proof of payments. All I want is my money refunded.