Bad customer service

I am unhappy that I had to pay for items and received different items bit then what tops that bad experience off is bad customer service. I am treated like I made the mistake. I have been buying online since before covid lockdown but never ever have I been handled so poorly. I am very upset about this, if it was my mistake it would have been a different story but it’s not my mistake. I have paid for a delivery but now to sort out a mistake not made by me I was told to keep the goods or return it to a store. Might I also add that the clear plastic book covers is in a bad condition. This is bad I am just very unhappy about this