Half done upgrade customer care alllmost nonexistent

I have requested an upgrade 2 weeks ago on my VT fibre to 200mb agenda told me 4-5 days. Got notification upgrade was successful but nothing changed. After talking to various people in the callcentre ,hours of holding was told speed not adjusted on Vumatel portal and PMO department will rectify. Promised by 2 agents on 5 and 6th will give feedback before close of business as they also cannot get hold of relevant department.Tried calling call centre again today from 8am till 11am calls gets cut after holding 20+ minutes every time. Please guys cleanup your act