Complaint - refund on account

I have never experienced such bad and horrible service from an organisation. In May 2020 I started receiving messages that my account wasn't paid. I paid more than I needed to each month via EFT and was actually in credit. After battling with Edgars on the phone via emails, sending proof of payments for 9 months all my payments were recorded and left me with a credit or R411 credit. I closed my account on the 11 Feb 2021 and on the 26 March 2021 received an sms stating I now have a credit of R380.69. I even went into Edgars Cresta on the 16th March 2021 and spoke to the manager - Nathi and he said that he emailed all doc's to Edgars requesting a refund and I should receive it within 24 to 48 hours. I have emailed them again, they requested further doc's which were sent on the 23 March 2021. I have emailed all docs and still no refund. I can see that this is just a ploy and that a refund is not forthcoming. How disappointing as I have been an Edgard client for over 35 years.