Tanishq — Golden Harvest plan fraud

I opted for golden harvest plan last year. For 10 months i was supposed to pay 10, 000 per month and if i keep the money as is (Accumulated 1, 00, 000); in the 13th month i will get interest of approx 6 to 7 thousand inr. I can either use this total amount to buy gold from tanishq or the total amount principal plus interest can be transferred to my account is what was promised when the tanishq sales person (Safia, kondapur, hyderabad) sold the scheme to me.
12th month i inquired about the total amount i will receive post 13th month. I informed that due to covid-19 situation, i do not plan to buy gold but need cash. They mentioned that they will not be giving the interest in cash (Or bank transfer) only the principal amount of 1, 00, 000 will be returned. They only gave inr 5671 voucher.
My complain is that they made a false sale of this scheme claiming that i will get the interest in the form of money and not just voucher.