PLDT Illegal Termination?

Long story short we have a connection issue everyday since last week of May (will disconnect before noon and will return sometime afternoon or evening). Tried to contact PLDT multiple times and said that they already raised/escalated this to their technicians to look at it and until now no technician has yet to come. Earlier, when I tried to contact them now their IVR says that my account number is INVALID (despite using the same account number for contacting them and for payments prior to this). Now we do still have line and internet available, but we can’t contact their customer support anymore. What’ll be the next step to deal with this because at this point the only thing that I have yet to do is to go directly to their office.

And yes, I’ve already raised this to DTI, DICT, and NTC through email as well so I’m waiting for their responses as well.