Kitchen unit gone wrong

I’m so annoyed… bought a washing machine and kitchen unit. I was made to wait 6 hours at the shop before the delivery car came so that I can take only my washing machine with. On Monday, they delivered the kitchen unit, very late in the evening after 6pm. I told them the kitchen unit was not what I expected. The following day, I went to the shop to report this, I was told it’s not a problem, they will just swop the kitchen unit for the one I preferred. It’s almost 2 weeks now, I’ve been waiting for the delivery and it hasn’t been done. Called head office and asked for assistance, still got none. I am not going to pay for this kitchen unit.