Croma — One plus 7t pro display phone bought they sacmed

We bought an one plus 7t pro display phone (which you put on the store as a demo ) they told us it will cost us 39, 700 and 4 things will come free
1. One year extended warranty
2. 1year screen protection
3. 1 year free repair on any appliances
4. Croma earphones
They didn't gave us bill on the spot, second day when we got the bill, the phones price mentioned on the bill was 30, 700 and they charged us 9 thousand for those schemes above-mentioned, and when confronted they gave us vague answer that if you buy those schemes they only phone will be available to you at this price. It was demo phone used for about year or two years who knows then they gave ripping price still we bought thinking this things are added for free, but they scammed us, by adding chargeable scheme which they told us that will come free and phones price is 39, 700. This is pure scam either by your company or your store(Junagadh).
This is the copy of invoice

Item code 221588 is the phone which they said will be priced 39, 700 around

Then the item code 184053, 226040, 226097, 219045 will be given free.

They did not gave the bill the day we bought the phone, they said because of the rush bill will be available to you tomorrow.

Second day when I got the bill I saw they charged for this schemes 39, 727
In this phones price was only 30, 799

And things that they told us to added free of cost was charged

For item code-184053, RS charged-2, 622
For item code-226040, RS charged-2, 867
For item code-226097, RS charged-2, 639

And then they throw in the croma earphones for 799 saying it's free,

Item code 219045- RS charged-799

Totally they charged 9000 rupees extra saying this all stuff is free