Question for Triolet Bus Service Co. Ltd

Why is it that your buses on the line 215 do not abide and respect the established time table especially at peak times in the morning and afternoon? For once or due to major problems,it is understandable not everyday.A delay of 5 to 10 minutes is acceptable but 20 to 25 minutes is UNACCEPTABLE.Easily veryfiable from your bus log-as proof I have bus tickets and I can prove.