Momentum queries follow up falls on deaf ears

Worst experience claim has been submitted in May. Every week I'm following up no reply even when I copy the team leader. Only read receipts. No progress update. Absolutely no customer centricity as much as a third party is handling the building claim, it is not my responsibility to follow up with Turnerix. Once this claim is finalized Iwill definately be changing. I have emails trailing from a month with absolutely no reply.