Diabetes Care that Doesn't

I use a Freestyle Libre sensor supplied by Abbott. When the sensor works, it's absolutely great. Unfortunately, when it doesn't it seems to be impossible to get any assistance at all. The sensor comes to me via CDE Pharmacy.

I have sent two mails to Abbott and one to CDE Pharmacy today and have had no response. It's not as if this isn't urgent as I now have to resort to finger *****s while the device I've paid for is unusable.