Pain dealing with incorrect delivery

It's just been a pain to sort out an incorrect item delivery. I'm sure if the correct item was delivered in the 1st place I would have been all praises. Fortunately, not too expensive, but a lesson learnt. To give you an idea: Mon 8 Apr. Ordered item stated to be delivered by Fri, Apr 12 Tue Apr 16: item delivered - wrong item (and slightly lateI. Send email to Customer Service. Fri 19 Apr: customer service advises wrong item will be collected. Mon 22 Apr - Fri 26 Apr: Courier never comes. Have to follow up multiple times with courier and LM. Mon 29 Apr: item collected. Tue 30 Apr: I send in a request for refund instead of re-delivery. Wed May 1: "(Leroy Merlin) have advised the department to process the refund, will advise once the refund has been done." Mon 13 May: stll no refund, I follow up. Tue: 14 May: "(LM) will advise once the refund has been processed." Mon 20 May (today): I had to send another follow up today as I still haven't received or heard anything.