Company will not payback full fee after committing

On the 27th I called Polmed to enquire if I would be refunded an amount which I'd pay cash to see a specialist. The call centre agent I spoke to confirmed full payment with advice that I should get a referral from a gp for full payment. After polmed smsed confirmation of payment I called to clarify the text as I was confused at how they had structured it. Again different agent confirmed that I'd be paid the full R1260. Last week I was only paid R624. Today I called & was advised by a person in \higher\" rank that I wasn't getting the full amount & \"as things stand this is all we are paying you\". I asked that I get access to the recording of the 27th as I am sure I specifically asked about full payment. Gentleman advised he would listen to it & get back to me. I do not trust anything going forward with this company in relation to transparency as a result I am willing to take this forward if Polmed does not sort this out. HOW DO I KNOW HE WON'T COME BACK TELL LIES ABOUT THE NATURE OF THE CALL. I WANT my money & need you guys to sort it out immediately"