Not allowed to return online

I bought some electrical items ,conduit pipes, distribution box and double socket plugs on the 11 December 2025 and on the 12 of December the items were delivered. My electrician advised I got incorrect size for the conduit pipes so then I go back to my orders to try process a return and my order still shows order in progress so I'm unable to log a return for the conduit pipes till today. I call the call centre today and they log a call for me ,they advise that another department will call me. When the other department calls they tell me that they called the store Protea glen and they were advised that I must go into the store to return the pipes ,the same pipes that came with a truck, this is 20mm × 4m conduit pipes. I must return all 15 pipes using what exactly ? Does that even make sense? They should just say they don't except returns and remind me not to buy from their store.