Airtel — Airtel internet Broadband Too much delaying and frustrating

It has been 2 weeks since I have requested for a upgradation order on Airtel for higher bandwidth
They said that within 24-48 hours of my request their team will contact me
2 days past no one contacted me so I contacted to their customer care and said that I have requested for upgradation and asked how long will it take
They replied to me saying that within 24 hours I will be contacted
Again no one contacted and same continued for 2-3 days then I stopped calling the customer care
Even I had mailed them regarding the matter and they said the same as on the call
So I didn't call them for a 2 weeks
And suddenly their team contacted me after 2 weeks saying your connection will be upgraded by tomorrow and you have your appointment tomorrow and gave me the number of the guy who was going to upgrade my connection from Airtel Team
So I got some hopes as I have studies and other stuff which requires higher bandwidth
So I contacted the Airtel guy who was coming the next day to upgrade my connection
He picked up my call and said I can come after 4 then I said okay come by that time
He didnt come at 4 and waiting for him so long I contacted him again and he said that he will be there in 10 minutes and call me
Its been 2 days now and no is picking up my calls now
I don't understand what game are they playing and I'm really disappointed about this
Calling themselves the number one and this is what the do with their customers :(
My Airtel Landline Number -[protected]