Tata Communications — New connection provided with one month free false commitment

We had opted for tata broadband as the sales person commited one month free and we took 3 months connection on November 17. Sales person mentioned one month free on the connection receipt details. Also informed us at the end of 3 months we will automatically get the 1 month free but now at the end of 3 months understand thatv it was a false commitment just to win the business. We trust tata brand and such stunts from the employees are creating mis trust over the brand. Tata Play Fiber ID: C[protected]
Kindly assist further on this and provide us the one month free subscription. Else we proceed to cancel the account and will never ever deal with Tata bradband and will ensure to inform all communities about such tactics used bt tata broadband employees.