School complaint letter

Hello Mr. Arnold, Sir, My daughter is one of the students of your school. Staying at a distant place from the school site, we had select for the school cab service provided by your school for her convenience. But it is unfortunate to bring to your notice that quite often the cab fails to meet the deadline to reach school on time, where every day it picks up my daughter at the right time from our society gate. We are really worried about the same. In fact we had a direct talk with the cab driver on this matter to which he clearly defended with unclear excuses of traffic jam, rail gate delays etc. Like any normal mind will accept the fact that the same accidental things cannot keep on happening everyday with the same person repeatedly. We are really scared of something fishy going on the way. Please take care of the same and help us to come out of the situation. Regards, John