Poor Banglalink network

Banglalink is in second position as a mobile operator company in Bangladesh and it is increasing its network coverage day by day. But last couple of days, the network has slowed down and it is really hard to get network not only at villages but also in metropolitan city like Dhaka. It is frustrating when we can't phone in our emergency times. A few days ago I was going to university and I had to phone my village home. I could not make a call. Recently, it is happening frequently for poor network. I along with other people, request humbly to concerned authority of Banglalink to take immediate steps to make a smooth network.