Has anyone else found a scheduling conflict (Volvo / Hypervolt)?

I am using the Charge app and the Hypervolt Pro 3 (bought through OVO) to charge my Volvo XC40 Recharge. 

It doesn’t work. 

Customer service has been woeful. I have to wait for 40 minutes plus to speak to someone, who doesn’t have an answer and who promises to ‘escalate’ it. I’ve had a ‘ticket raised’ which amounted to zero contact. I’ve sent three emails and had no response to any of them. 

So what’s happening…

The car doesn’t charge through the app. I set the schedule, wake up the next day and nothing. I thought it might be the fact that Vovlo settings have their own schedule internally - I disabled it. It worked. Then it didn’t again. 

When I looked, something between the app and the car had switched the Volvo’s internal schedule on again. This morning however, that wasn’t the case at all, it was still disabled but the car hadn’t charged. When I went to bed last night the schedule was set for it all to be done by 0700 this morning through the Charge app. 

There is nothing wrong with the charger - when it does schedule a charge it works fine. But it rarely works at all. 
My research (if you can call it that) says that there is an issue with the Charge Connect Protocol (CCP) but I do not know how to resolve it - and it seems, neither do OVO. I signed up to another fixed rate tarrif with OVO because I liked them and this charge anytime seemed like a good thing. But in fact, I am having to use public chargers a lot and this EV is now actually costing me more to run than my old diesel. 

I’ve deleted the apps and reinstalled them. Several times. 

Does anyone have any ideas? I’ve already told OVO that if they can’t resolve this they need to remove the charger, refund the money and release me from my contract - I haven’t received the services promised. But I don’t want it to get to that, it would be far easier and better just to have this issue resolved.