Etisalat review: Incoming calls are not connecting

I am Rasheed, holder of Etisalat number [protected].
I would like to raise a complaint regarding an ongoing issue for the past two weeks. Several of my colleagues have been unable to reach me when they call. The phone rings once and then the call gets disconnected.
I have contacted Etisalat 3–4 times to report this problem. Each time, the issue is temporarily resolved, but after about an hour it returns. I have also performed self‑troubleshooting multiple times, but the problem continues to repeat.
At this stage, the only solution I can see is to switch from Etisalat to Du. If this issue continues, I will have no choice but to proceed with the change.