Amazon UK Website Would Not Let Me Complete My Order

I have been trying to buy a folding camping chair from Amazon UK for more than three hours and I still have not been able to complete my purchase. I tried multiple times on the website and kept getting stuck on the product page of the SONGMICS camping chair without being able to finalize the order. During this time, I also tried to find a phone number to contact Amazon UK customer service directly, but I could not find any number to call. This has cost me a lot of time and caused serious frustration, as I simply wanted to place a straightforward order. I request that Amazon UK contacts me by phone as soon as possible, helps me complete the purchase of the folding camping chair, and checks and resolves whatever technical issue on the website is preventing me from finishing my order.