RingCentral: Reliability Issues

I have been using Ring Central for 6 Months and have spent over 100 man hours customizing it and trying to make it function properly.... I am throwing in the towel I am looking for a new Service provider. I get the system working for a week come back and wham something else is going on with the system. Cant call out today, not receiving calls tommorow. Then wait on hold for 15-20 min to get to customer service and then be on the phone for 1 hr + with customer service monkeying around with the system it just seems like a joke. I will keep VOIP however just going to find a comapny that can be more reliable. Ring Central thanks for showing me what to look for in a phone provider.