NON adherence to return policy

If i could I could possibly give it a 0 star cause of the bad service and ***** i experienced at this Goldwagen as well as the staff a guy named Saied. On the 27th of Sept 2023 my partner with our mechanic went in to purchase two items one of the part bought was A lead bet which we returned the next day as it was not working on our vehicle, then they told us they have to test the part we returned it might take 7 to 14 working days, which we waited and called we called them on the 23th of October and was told they had back log and the part hasnt been tested yet, then we follow up again on the 26th of October still nothing then again on the 22 of November nothing we ended up buying another elsewhere and waited for the feedback, which we only got a call the last week of December 2023, which I told the guy we coming to fetch our refund and it took Goldwagen 3 months to test the part and get back to us, when we arrived at the branch in lenasia, they guy refused to refund us said he called us in the 20th of October to tell us th part was ready but got no answer, but when we called him on the 23rd, 26th October and 22 november he told us it was not. and he even vabricated the eviedence said he wrote on the receipt book that he called us on the 20th, we showed him our call logs and he failed to produce real eveidence, I called the head office spoke to a lady who promised to follow up for us and provide feedback till now we haven't resolved the issue. I am very disspointed and disgusted by all this.