Nobroker - Unethical misleading and falsifying commitment by sales representative to close a deal

No borker sales representative shivakumar called on **th Nov @ **:** PM regarding Tenent Relax plan, on call i had clearly mentioned on multiple times that plan to be activated from *st December ****, and I was assured by shivakumar that validity of ** days counted will be counted from *st December. I had asked him send the confirmation on email, he said once payment is made he will send the request and i would get an email after the call. An Hour later, I received a call from assigned RM and he told me plan is active and validity will be counted from **th nob not from *st December. This is highly unprofessional, unethical, misleading and falsifying commitments by sales representatives to close a deal. I want no broker activate the paln from *st December and count validity of **days from *st December, if they can't start the paln from *st December, i want a full refund as i was mislead by sale representative