Indian Oil Corporation [IOC] — meter reading jump

3148 RS filled, I've made a prior transaction of 3000 RS and there was no prior amount put.
It was a clear meter jump from 1200 RS to 3148 rs. Please check the meter and I've made a transaction of 3000rs with my SBI credit card PRIOR.
They haven't questioned me on the meter jump and the employee accepted that it is a meter problem please report them as meter jump is a crime and fraud.