Punjab State Power Corporation [PSPCL] — i am complaining about high bill amount

Address: Mohali, Punjab, 140603

My account no. Is z74zk280568n
I’ve observed that from 5-6 months my bill amount is not as per the usage. The usage is less whereas the bill amount is too much. Please help me with this issue. I have a standing bill which needs to be cleared but when i log in from the website for online payment my bill is not found there. This further makes the payment delayed and hence the extra chages.