Refunding into incorrect accounts and being charged a service fee for my credit

I have tried getting a refund since March 2020 and have tried numerous times to email relevant email addresses and I have not gotten any joy.

I had made a purchase at CNA in Feb 2020 and I realised that I was charged full price instead of the correct marked down price. I used my thank you card for points but paid with my bank card. I immediately advised them and they processed a refund, she had first asked me for my thank you card however she proceeded to refund me to my thank you account.

The issue is that this credit that was now on my account, depleted for whatever reason. I had requested for the refund to be processed into my card on numerous occasions as initially they had reversed the amount where my credit was depleted, however the issue still happened.

Please assist with getting my funds back into my bank account including the usual lending/repo rate which is attached to my Edgars account.

I am utterly disgusted with the lack of response and resolution in almost 1 year.