Very Bad Customer Treat and Unfair treatment

I own a Hisense 3dr fridge whic is out of warranty. In 2021 the fan motor broke down and I had to get the part from Hisense. I paid for the part and forgot to delete hisense banking details from my beneficiaries. On 24th December 2021 I accidentally paid my bond instalment into Hisense bank account instead if my homeloan account. I only realised the mistake on 4th March 2022 when my bank advised me of the missing payment. I immediately called hisense and spoke to Lusanda who confirmed receipt of the amount and that it is lying on unclaimed funds. She then asked me to request a refund via email and attach my proof of banking details together with my copy of ID. Upon confirming if she received my email, she advised me that payment would be made within 48hr. I followed up on the 7th March 2022 and spoke to Lushay, she then told me that refund wont me done unless I complete a refund request form and send it to her. I immediately sent the form and she assured me that I should have my refund by Friday the 11th. I called again on the 14th March 2022 as there was no refund paid to my account, instead Lushay kept on promising to check with finance and call me back but never did. I then asked to speak to Lushay's supervisor as I was not getting any joy from her. ***no the supervisor eventually took my call and to my surprise to told me that it takes up to six weeks to do a refund. As I was not satisfied with ***no's response, I then spoke to Robin Silberbauer on the 18th March with the hope that he will understand the urgency of my situation. He promised to check with everyone involved in refunds at his office and give me a call within an hour. He has since disappeared and does not respond even when I followed up with via email. Instead Robin asked Lushay to call me late in the afternoon of the 18th, Lushay told me that payment was done and it would reflect late in the afternoon or on Tuesday as Monday was the holiday. Today is the 23rd March and I still have not received my payment and no one is willing to take ownership of my query in Hisense office. Today I spoke to Thuli whom I believe she is the supervisor in the customer service, she also promised that I will get a call from herself or Robin with an answer before the end of business today, still no one has called and its now 6pm. I have also looked at other complaints against the company Hisense, the company has no regard for good consumer experience. Never mind the customer protection laws in this country, the service is unbearable and the customer treatment is very poor...