Hi,
I have recently had a Vaillant aroTherm Plus heat pump installed, which is eligible for the Heat Pump Plus add on.
I have entered all details in the eligibility checker and got a message back saying that OVO will get in touch in the next 5-7 days. It has been more than 3 weeks and I haven't got any correspondence with OVO.
I have sent an email to OVO, and also I have been redirected to Heat Pump department but the line just drops after a while.
I have exhausted all communication channels to get to some one to no avail.
Any recommendations as what to do now? Basically their tariff is the main reason I signed up with OVO but I cannot do a simple thing of adding their tariff.

