Rto India — Vehicle fitness apply slot not available

I’m from Bareilly Uttar Pradesh. When I apply for my tank truck fitness renewal prior to the 45 days of expiring of fitness then site shows that you can apply for fitness within 45 days of expiry. I apply for my tank truck fitness on 45 days then show you can apply within 45 days then I apply for fitness on 44 days prior to the expiring date then show no available slot then I try on 43 days prior then also show not available slot, I apply 42 prior then also same thing show slot not available. So how Can I apply. This problem show with all my vehicle and other people vehicles of Bareilly . I can’t understand what the RTO office bareilly officers doing. They open the fitness slot after taking the bribe. If you pay only then you can take a fitness date from RTO office Bareilly otherwise your fitness will expire but you can renew it. In other RTO office o[censored]ttar pradesh you can apply for fitness renewal on the same day of fitness expiring or a day before the fitness expiring all slots will available but In bareilly uttar pradesh you can only apply within 45 days of expiring fitness But still you will not get slot available. In other cities o[censored]ttar pradesh and other states you can apply same day of expiring you get slot available.