Purple Turtle Car Wash, they do not appologise when they wrong

We went there with both our cars every 2nd week, first the one then fetch one and leave the other. Recently they only take cash (not a problem), but they also do not give you a slip, when I paid my car the lady (wife of the owner) said the car is not on the system, let me just give you your change and keys I will sort it out later. When my husband fetch his bakkie, she said you must pay for 2 cars, he said my wife paid for her car when fetching it, she said "by who" he said not sure, then she said you must pay for the bakkie, he said yes that why I am here, the money lying on the counter already, she made the mistake but do not say sorry, they have a problem now with us. Anyway we thought just leave it all and took the cars today, he then said he will not wash our cars anymore, so petty🤣anyway we took it to the car wash just opposite them, must cheaper and very friendly and helpful. Now they lost 7 cars, because my kids and also my mom use to go there and we will also tell our friends about the new place. All of this just because they were wrong by not giving you a slip as prove of payment. Will not advise anyone to go there. They obviously do not need the business.