Airtel — upload speed problem

Address:

Kolkata, West Bengal, 700124

I had launched a complain to airtel almost a month ago and then i mailed them too and then also contacted via telephone again but my problem with upload speed is not solved yet.
In a 4g enabled phone with a 4g connection i am getting almost 350kb/s upload speed in youtube which is horrible. My pincode is 700124 and this is a 4g covered area and airtel's open network program also shows this area as a 4g covered area.in my house i am getting this slow upload speed where my download speed is upto 4mb/s and when i told these to airtel they said it is a issue with indoor connection. Airtel said they will solve this problem within 1week but they didn't.

My airtel number is: [protected]