Meghbela Broadband — Very bad internet service

Hi Guys, I'm working from home at night and taken broadband connection from meghbela broadband but their service each night down at 2-3am and resume at 10 am in the morning. After multiple requests they just inform that your service has been resumed and working fine. Please let me know if issue still persist. This is not at all fulfilling my purpose of taking internet at home. Their call also is not helpfull.