LazyPay And Hathway — spam calls and threatening messages

I had taken a hathway connection for which i mistakenly (By the influence of hathway person) paid the amount through lazypay. As i wasn't aware about it, i repaid the same amount for the same month directly to hathway and not lazypay. Now lazypay people are spamming me like hell. I have sent several emails to both these organizations and have asked them to settle the amount between themselves but still they are not leaving me. I get hundreds of spam calls from lazypay daily. I will never ever use this thing in my life again and hathway is so unprofessional that they are not sending the extra amount to this lazypay. Such are the startups in our country. Fake and #. Please stop spamming me.