Alliance — very slow internet from alliance

Address:

30A, Taltala Bazaar Street, kolkata 14

So from today my internet speed has been extremely slow according to speed test it shows around 8 mbps

My net was working fine since morning when the connection went off and ever see it came back had been very slow

Using ping command i'm getting request time out frequently

Have a plan of 60 mbps but since may it has been worse
Complaining in their office has been of no use, they just ignore please see to this
My id is zayeem_mb