Wrong Item Delivered with no Return and Refund

I ordered a vehicle accessory part (Toyota Hill Legend Double Cab Side Step), and what I received was a single cab sidestep. I logged a return and exchange request, with a price difference. I waited for the update, from which I was to be charged for the difference upon acceptance of the goods for exchange but was never asked to make payment and instead I received a message that the goods are ready to be collected.

I received the package and upon inspecting it later, realized that it was the same item I had returned for exchange. I then looked another return and refund request of which i was given a reference and told to wait for a decision. Time went by there was no communication until I logged in again another request (return and refund), but this time I was told that the time period for refunds had expired. They said they will return the wrong items and if I do not collect them, then they will dispose of them after 30 days.

I was frustrated and wrote an email to query the decision as the delay and non response was from their side. I received a response that the matter was escalated to the manager and I will receive feedback. Instead of receiving feedback, I got a surprise when I came to work one morning that a parcel had arrived for me and was dropped off around 5pm to security at my work place and I did not know anything about a delivery. When I checked the parcel, it was the same items that I had returned and was waiting for feedback from management. They decided to dump the items without my knowledge. Now I am stuck with an item I cannot use and it is frustrating that I have since not received one email from the manager to whom the matter was escalated to.