We have a problem with one of our DID's at DIDWW. It stopped working 2 weeks ago, you can call the number, it rings but it does not enter our VOIP system, nor is it displayed in DIDWW's call list.

Their support was not too informative, we have asked several times what the issue is, how long the resolution takes but we just got the standard 'sorry, we are working on it' style answers.
Resolving a technical issue can't take 2 weeks! What's going on?

Does anyone else have/had issues with them or any Swiss DID number at another provider?