Given the wrong spare wheel and company refuses to own up or provide replacement

I bought a used vehicle (2013 Renault Megane) from Integra Motors last year around May.

2 weeks ago I had a puncture for the first time and had to change the tyre. While attempting to change it, I realized that the spare wheel has 4 lugs whereas the other wheels have 5 lugs.

I had to call a truck to tow the car because I couldn't replace the tyre and it was at night so I couldn't go get the punctured tyre patched or replaced.

Assuming that a mistake had happened at the dealership, I called the agent who had sold me the car and explained to him what happened and he promised that he would take care of it.

Fast forward some days later he tells me that his manager declined to have the spare replaced because I bought the car a year ago and that the workshop record shows that the correct spare was given to me.

I asked for this record to be sent to me and I was told that it is the 120 point check. I have looked at all the checkpoints in the 120 point check and there is nowhere where it states the number of lugs on a spare wheel.

I am extremely unhappy at how this has been handled as I feel that I have just been brushed off. I would not recommend anyone to buy a car from Integra Motors if this is how they treat their clients.