Service charges ??

Hello Everyone Good Evening. I have a small query regarding APSPDCL service charges. I know that recently government restricted paying power bills through upi platforms. They instructed us to pay by using APSPDCL official portal . But they are charging more than Rs 5 service charges for the bill Rs 264. Does this service charge is compulsory do they introduced recently and why they are charging that much of amount as service charges . When I used to pay power bills through upi platforms they used to charge Rs 1 or below Rs 1 as service charges . Can anyone please clarify this ??