Telangana State Road Transport Corporation [TSRTC] — Ticket charged very much high than online by the bus service

See recently I'm traveling from Bangalore ( kemepegowda Bus Station) to Hyderabad in a super luxury with the service no. 7144 Karimnagar depot. The bus driver charged me 1000/- when taking the ticket inside the bus but when checked through online it is 750/- only. Since the bus is free I opted out to book online.
Now I regret the decision on not choosing online.
Just yesterday I traveled from Hyderabad to Bangalore in Garuda plus with 1030
Is the cost of super luxury and Garuda the same? Ones an AC bus and other being a non AC

I strictly ask of my refund for this service which demanded higher amount.