saying I missed a payment early last year

Virgin Active was supposed to phone me today im regards to a payment they say I missed which I didnt I have proof of payment that it was paid and I am sick and tired of this inconvience aswell as Virgin active calling me for a second then putting the phone down as to have a record i missed a call or something. I am very close to closing my account. My boyfriend already closed his also. Not impressed please sort this out immediately.