Mobikwik — Extra penalty charge

I used zip balance of my mobiquick account, which was 1000 rs. But when i got my bill its shows 1299 rs. When i tried to pay this amount then system shows error "YOUR REQUEST CAN NOT BE PROCESSED".
when i try to contact with mobiquick team, then tried to fooled me on this.
Now my pending dues shows 1499 rs, while i did't use a single rupees after my first bill.
My upi for mobiquick is - [protected]@ikwik