No customer Service

I bought a monthly ticket and only used it for 2 weeks then I became sick. Today I went to the bus dep to get a discount on my monthly ticket as they normally give discounts on weekly tickets. I was sent from pillar to post up until I met with their manager. They told me that I should've. Brought the ticket before the month ends and on the other hand they telling me that there's nothing they can do about it. My problem is that they telling me different stories and that there's nothing they can do. Where is their customer service . They can't even give us an explanation. They can refund a weekly ticket but can't on a monthly ticket? Am really dissapointed.