Money missing between Capitec and Avis and no-one to resolve

I need urgent assistance because I have been pushed back and forth for several months regarding this issue.

On the 19th of February 2021 I rented a car from Avis Menlyn park in Pretoria for R5155 from my debit card, I was then refunded the money in March and then was debited again on the 15 March 2021 for the amount of R5155. I had only had R122,79 in my account when the R5155 was debited leaving my savings account at -R5032,21.

Today I sit with Avis stating they have not received the funds and Capitec saying that the R5155 was collected on the 15th March.

My question includes: 1) How did Capitec allow a savings account to go into the negatives? 2) Where is the money sitting? 3) Who has the experience to resolve this matter!?

I have been sent from pillar to post, one call and email after the other and still nowhere. The consultants that I dealt with are either clueless or not willing to assist from either side! R5155 has gone missing between your 2 companies yet I am responsible for the repayment to both of you! I need this matter resolved urgently or I will report both companies to the Ombudsman.