Exporters India — Demanding more money even after paying full amount

Our Company name is Nickunj Eximp Entp P ltd - we are more than 5 decade year old company . Mr. Pankaj from exporters india confirmed on email + chat + voice recording that he is providing platinum + membership for 1 year for 10800 inclusive of gst and we imemdiately made the payment

Now their accounts team calls up and asks to pay more 7200 which is totally fraud . we will file a case in consumer court against this malpractice done by their employee