Poor service

I have been calling for the past weeks about my connection, my router was flashing the green light under PON as if I didn't pay and I did pay on the 1st of July,I have been without any internet connection since the day I paid till now and I use network for work and school. Now the flashing light has stopped but my old and the new password that I got from you guys is not going through. Please fix this or come and disconnect your fibre and give me my refund. I'm really getting exhausted with your poor service.