Worse returning experience

I need help, I bought some products online on typo for 25% off. The very next day the products went to 50%, I then placed another order. Meaning that I now have two of the same orders. I now wish to return the 25% products that I bought. I went into the Canal Walk store and the manager was very nonchalant. They called the call centre to authorise the return but was told they closed on weekends. They then said I should come back in the week. I cannot, I work for a living and can only go on the weekend. I then had a work function on Wednesday which I thought it’s on my way to Typo, I popped in and the store person then waited on someone to answer the call for more than 20 mins on hold. I was late for my event and once again had to leave with the products. I arranged collection and the driver went to the wrong address. I don’t know what to do anymore. I need a refund. Can I also add that the chat services are terrible, it keep kicking me out when I am in another app on my phone. Do you guys expect me to watch that I am in a queue of 10 people. Makes no sense. When u do get to am agent I have to wait 10mins for a response between messages with absolutely 0 help. I even called DPD as well and they asked for a reference which none of my emails or texts have. Useless.