Hathway Cable & Datacom — Plan change regarding and no response of mail

Address:	Gautam Buddh Nagar, Uttar Pradesh, 201301
Website:	www.hathway.com

I am using hathway connection and my id is 1230280 and i submit the plan change request last month and i paid full payment of that plan but my plan was not change, in this month hathway executive said that i need to pay full payment again but i paid extra amount last month and in this regard i sent mail to [protected]@hathway.Net because last month ms. Mamta said you need to send mail at this id for plan change but i did not get any revert from her side.
I need immediatel response from hathway side.