Is there anyone from Bell Mobility to help us unblock a routing issue?

Hi, We are looking for someone from Bell mobility NOC. We are a VoIP service provider: Cloudli Communication ASN#18637. We are peering with Bell ISP and advertising the IP block 198.38.7.0/24. We have connectivity problems with our customers, when they are on the Bell LTE networks in the Lac Saint-Jean region. For information, when customers move to another region, everything works fine. This disorder started in April. Thank you Raphael Grenier