Hathway — Constant Calls and Harassment

I had been using Hathway Broadband for almost 5 years until this month. The service was patchy and the support was horrible. After I did not renew it this month, I have been getting atleast 10 calls daily asking to renew my account. Even on the previously used phone number which is no longer the registered phone number, I am getting multiple calls daily. I have asked them many times to stop calling me yet the harassment has not stopped. I am attaching the screenshot showing all the spam calls from Hathway. Kindly assist me with getting rid of these nuisance calls and get some peace.