Indian Oil Corporation [IOC] — Digital money not accepted by petrol pump

Today i had visited indian oil petrol pump in thirumala, thiruvananthapuram and asked to fill by bike with 1liter petrol (As i have to check millage of vehicle) after filling by theattender i handover my debt card for paying the amount. He went to his supervisor and came back informing me i will have a bill amount atleast 100 rs to use the card
I enquired is this any rule by bank (Pos machine provider) or ioc that rs 100 is minimum amount
They started arguing that i will have to pay eit by google pay for 1 ltr or they will charge 100 rs from my card and pay me back remaining balance amount as cash

Irony is this new digital india where even pertrol station attender can give you atm services

Wah re modi sarkar ke maaya

I have no issue with modi sarkar but some people are using illicit way to trouble ordinary people