OVO Charge Anytime not working

I have been experiencing problems with OVO, ever since they shut down my main account and reopened a new one for me. 

Since the new account was opened, my Charge anytime has not been working. This has now happened twice; the charge is not deducting from my final bill each month. When I check the 'Charge Anytime' app, it states I am not eligible for 'Charge Anytime' because I do not have a smart meter. I do have a Smart Meter and I have been using charge anytime for nearly a year without any problems until OVO opened me a new account. This is costing me hundreds each month. Please can someone help as a matter of urgency; this situation is becoming ridiculous. I spoke to Charge Anytime last month, and they said this problem was solved. However, it clearly isn't, as the Charge anytime credits have not been deducted from my final bill. Now, my new account states I'm not eligible because I don't have a Smart meter, which I obviously do.

When I try and sign up to Charge Anytime on this account, it says Sorry, your setup isn't compatible right now. Install a Smart Meter.