Homebase Refunded Wrong Items After I Returned Faulty Garden Lights and Other Products

Since I live far from a Homebase, I have now made two visits to resolve problems in the same sequence. The first time I picked up a click-and-collect order and discovered, when I arrived home, one of the garden lights was broken. Today I went back to the store to exchange it and return a couple other things from the order. The encounter was even more aggravating because the customer support desk agent was icy and unresponsive. She misidentified the things I set out for return, hence I had to correct her. I trusted her to handle the appropriate goods as no receipt is offered for a return of an internet order. But upon arriving home and reviewing my email, I discovered she repaid the incorrect items—those less expensive than what I had returned! I'm now left without the right refund and the store's poor customer service has created negative impressions. Really let down by Homebase's lack of service and meticulousness.