Review Terrible experience

I want to inform or to empower nnus service that customer has the right to choose the vehicle he or her want to travel with ... today after travelling with nnus for more than 7yrs am so disappointed when i said that i want to change my recipts because i was not comfortable with my seat. And i was rushing to the airport from naivasha to nairobi but the lady who was in the office returned my money back that i will wait for that vehicle to be full ... drives tried to talk to her to change my receipt she said no ... that was my most and worst day i had to hire a taxi from naivasha to nairobi . I will never travelled with nnus and i will not recommend anyone ... nkt