St Courier — Overcharged (Rs.270 instead of Rs.70) for courier from Chennai to Salem

On 07/09/2021, I planned to send a parcel from Chennai to Salem which is usually about Rs.70 (Speed courier) but yesterday I was charged Rs.270.
When enquired they said its the standard pricing here.

Today I opened the courier tracker, the receipt showed it was charged only Rs.70. This is a open theft from customers.

I have both the copies of Receipt, one in which Rs.270 is mention which I have in my hand and other send to delivery that was taken from tracker webpage