Dolphin — Network problem in my area chembur Thakkar Bappa colony

Dear Sir,

I am a regular consumer of MTNL Delhi Dolphin services (Mobile NOs.[protected]. The Network of Dolphin remains disturbed frequently. Owing to the problem of disturbed network, I have been suffering great difficulties for attending incoming & outgoing calls from a week: Some time while talking on mobile the network fails, calls disconnects & it causes huge problems to the users.
So, please take appropriate action. I will be greatly thankful to you