Disgusting service

I have been a long time and loyal customer to Ackermans/ Tenacity for years and recently tried to purchase on my account and was declined went to the shop and was advised as I didn't use the account it was closed in 2020 and also Ackermans owed me a credit , I've overpaid them most times as had a good relationship with them.I was never made aware that my account would be closed permanently/that I had a credit this has been ongoing since beginning September.I tried to open a new account but was declined due to the closed account still showing. I've been advised to request credit and was advised to get a statement from my bank to proof I had paid them.My account was never in arres and I always paid on time .I've escalated the matter as they keep coming up with different stories not to give me my refund,I received an email today to say they are looking into the matter to see if the bank statement is suffice .I had to wait for a bank statement from September 2020 to proof I cleared my balance.I am disgusted and disappointed at the way Ackermans are treating their customers .I wanted to open an account with them again but will take my business elsewhere,Edgars were just such ******* and look where they are .