CUSTOMER CARE Line disappointing

I have tried several times over the last 2 weeks to contact their CUSTOMER CARE Line and to no avail. Each time waiting up to 5 minutes. Irrespective of the time of day they always experiencing high call volumes. It's ridiculous. I've also left my details on their web facility to revert back to me. Still waiting. That was almost 2 weeks ago. It's a truly disappointing experience.