Avis - Double rentals charged

I made use of Avis rental cars on 1st of March 2022 and was billed on the day. On the 10th of March 2022 the exact same amount was taken off my credit card. On enquiry I was told Avis had billing issue and duplications occured On 1st of April 2002 I received a mail from Gift Chiloane Customer Care Agent that all double rentals refunds were processed. It is now the 14th of April 2022 and I haven't received anything yet and no response from Avis customer care in regards to my query. Worst rental company by a mile