Welcome to TPG Community!
I've located your account using your Community details and has completed series of tests. The result shows a possible issue with the physical line.
But I do still recommend that we have one of our technicians give you a call to resolve your issue as your service may be affected by other factors.
Please let us know your best time and contact number via PM so I can get a technician to call you.
For your reference, please see this link on how to send a PM.