Poor customer service

I made a lay-by at the Liberty Promenade store ,which I later cancelled prior to the expiration date. On the day of cancellation I was advised they don’t do refunds so I should wait to receive a voucher to the value of the amount used for that lay-by. 30 days later I return to the store to enquire regarding the voucher since I had not received it. I was advised that there is no such thing and I was supposed to get the voucher on the day of the cancellation. In an attempt to refund my money back ,there was no success since I did not have the slip they provided me on the day of the cancellation. I was advised to go get an affidavit and they will further assist me. I then went back and it turned into a whole backchat with a lot of attitude and mistreatment from the manager of the store. The manager said the person who assisted me no longer works there ,she then sent the lady a WhatsApp message asking about the issue of the voucher and the manager asked me to wait for a response because there is nothing she can do about it. The lady who advised me about the affidavit also denied that she told me the affidavit will help. The manager later on did a reprint of all the slips regarding the lay-by. I requested that they rather then retrieve the information of the voucher since the manager was adamant that I was already provided with the voucher upon cancellation. With the manager failing to assist me one of the ladies working there offered to escalate the matter to the relevant team for investigation so I can get the voucher information and we can see who used the voucher and where it was used. More than 10 business days later I am still waiting for a response regarding my request for them to retrieve the voucher because if they say they gave me the voucher and I hadn’t received it ,that means it should still be available to be used. I was made to feel little like a dishonest customer looking to **** the company