Under Armour Canal Walk - Shocking Customer Service

I had purchased 3 Under Armour items online, however the one item did not fit. With my previous experience of having a returned an online item, it only got credited after three weeks, therefore decided to rather go in store for the return, which turned out even worse. I took my item in to the Under Armour Canal Walk store to return, but was informed that Canal Walk store does not do refunds only exchanges. This was what I wanted from the start, nevertheless the store did not have a size, and none of their other retail stores had a size either. So I requested a refund seeing that they were unable to provide me with same / similar garment. They told me that they can't provide me with a refund, as I purchased via. Payjustnow (similar to a credit card purchase). I then enquired that I returned an item at the UA Store V&A branch, and they refunded the item, so how is it that the Canal Walk store is unable to facilitate a refund. I requested to see the Manager, who I was informed was Torique. Upon checking for him in the back of the store, they informed that he was not in store and in the centre, and probably in the toilet. I then left the store and informed them that I will return to see Manager Torique. When I returned after 15 minutes, they informed Torique was still not in store and in the toilet, and I must deal with assistant Manager, who might I add, did not have a customer centric attitude. The assistant manager informed that he will refund Payjustnow rather than me, which I duly agreed to, and then informed that I must leave the garment in store and the credit will be facilitated via. Payjustnow. I informed him that it does not work like this, I cannot trust and leave my garment in store without documentation to show that my item has been accepted and will be credited. I was taken aback that Under Armour that portray themselves as an international brand, carry out their business in such an unprofessional way. Looking at all the negative feedback on social media, I can't believe that the UA Franchisor would allow this Franchisee to ruin the Under Armour brand with the sort of feedback on social media, it will surely ruin the Under Armour brand in S.A. if the Franchisor does not take a firm hold of his S.A. Brand.