Accused of shop lifting in Poundland. Should I complain?

There was a Tesco car wash near my previous workplace, and i used to go there every week to wash my car. Since I was a regular customer, i was close with the car wash manager and passed casual jokes. One day when i went there, he announced, "he is back," and also told me you are stealing things from us. I thought he was just mocking me and didn't think much of it. then he started keeping on telling the same thing and started accusing me of stealing things from the car wash. there were so many other customers there. I was quite surprised to hear that and asked, what did i steal?" then he told me i stole a car washing cloth. one of his employees saw me put it in my car's boot and leave. Actually what happened was that, on my previous visit I noticed some water droplets in the back of the car after they cleaned it. Since it will get dusty and become a mark, I took a cleaning cloth from my car's boot (I always have a cleaning kit in my car's boot) and wiped it.Since they also had the same cloth car there, they thought i used their cloth and took it. it So they started accusing me of theft in front of everyone. i really got pissed off and got angry. I showed the manager my cleaning kit and told him I didn't need to steal a 5-pound cloth. I thought of many times to put a review for the car wash with the details but never did.