Hathway Cable & Datacom — sunnxt one year free subscription offer

Address:	Hyderabad, Telangana, 500039
Website:	www.hathway.com

I took new hathway broadband connection on 29th aug 2018 with sun nxt one year subscription offer. But after ot of followup recieved sunnxt coupon code but it was saying invalid or coupon expired. I raised several request with hathway customer care but still i didn't get proper response. So thought of raising my concern with youvguys. Could you please help me to get out of this issue
Below is my details:
My hathway account number: [protected]
Mobile number: [protected]
Email: [protected]@gmail.com

Thanks for your support in advance.

Regards,