Hathway : customer harassment

I have used hathway broadband for 7.5 years without many issues. Whenever my connection is about to expire, the customer case used to call me and request me to renew. Recently my broadband validity expired about 2 weeks ago.

I have been getting calls every half an hour every day from different different numbers asking me to renew. I told them I am out of station and I will renew after 2 weeks when I come back to Chennai. But there is no letting up from these calls, even after I explained to them so many times. They are are ABSOLUTELY HARASSING me.

I cannot sit in peace at home or at work or anywhere without hathway calls every few minutes. I am feeling very irritated by this and now I am thinking of surrendering my connection only. I have never been pestered so much by "relationship managers". If anything they just damaged the relationship.