[Resolved]  Hathway Cable & Datacom — complaining about calls

We a group of friends were a subscriber of hathway broadband connection when were in delhi. After college we left to our home town telangana. I've submitted the modem through my friend last year after log of harrasing calls from them. During submission of the modem they didn't provide any receipt even though we've asked for it saying that they don't provide any receipt for submission of modem. Now today (30 july 2019), they're calling me and saying that i've not submitted the modem. Account no. [protected]. Phone number [protected]