Confused service

My name is leo<br> I've been a customer for 8yrs and the service I am now receiving is confusing and frustrating me I have 5 contracts with Vodacom I paid my account on the 24th October 2015 via a easypay outlet at checkers edenvale which is one of the way to pay mentioned on the statement and since then have countless problems trying to sort my account out which they now say is in arrears I have contacted them on numerous occasions and explained the situation to them and also went back to checkers to track the payment which they did and confirmed that it did go through(very helpful)Vodacom then did confirm that the payment was made after I sent proof of payment and said the funds would be allocated to the account but now have changed and said no funds were paid in and that I should go back to checkers and get a refund at one stage my line was disconnected and I was terribly in convenience up to now I'm confused as to how I can resolve this I'm due an upgrade but unable to do so please can you help