Onavo data app - useless?

[JKHypno]

I have 3 x Samsung Galaxy S2's on contract with BT on their Oneplan. Data allowance per phone, per month is 500mb. First month was fine, then BT said that my phone had overused data by

 

[JKHypno]

OK, so Onavo finally got back to me and said "sorry, that shouldn't happen. We will have our DEV team investigate this". However...I also contacted BT and told them I was asking Onavo for help, and guess what?...Instantly got an email offering a 60% reduction on both of the overuse charges as a 'goodwill gesture', totalling

 

[JKHypno]

OK, so Onavo finally got back to me and said "sorry, that shouldn't happen. We will have our DEV team investigate this".

Well, that was a month ago. Nothing more from Onavo. Total waste of time. Learn from my experience and find another data check company because these people are useless. If you want a 'pretty app' then fine, but if you need an app that works and can be relied upon, look elsewhere. I certainly will.