Bharat Sanchar Nigam [BSNL] — isp taking large amount of wireless broadband device

Address:

Koutputli,

Hii sir, my name ritika sharma. I am currently living in paota, district jaipur,
Rajasthan. My area pincode is 303106.
Sir my isp of koutputli is taking too much amount for wireless router device which are used to install on roofs. He is charging 5600 rs for the device + 800 rs installation charges. And the total amount he is asking is 7000 rs, i don't know what to do now. Sir here in paota, there was a bsnl office but it is closed now. Sir i have contacted to bsnl customer care they told me that device charge is only 3250 rs + 250rs installation charges, then sir why he is taking too many extra rupees. He have franchisee of bsnl in koutputli (My tehesil).
Sir he is taking too much money from what i supposed to pay, and i think this device is also the government property, so they should not charge too much.

Sir please help, these people are taking wrong advantage of not availability of service.
Isp mobile number :- [protected]
Sir you can also ask him for a new wireless connection for paota, then he will tell you the same price.