Data paid for twice,not transferred to client

Opened account with Openweb in Jan 2015. From March onwards, slow connection and lack of technical support. Two weeks ago, started experiencing line dropping over the weekend. Data ran out, so I purchased a 5GB top-up. This suddenly went down after using 1067MB. Openweb claimed that I used up the 5GB. I paid for another 5Gb the next day. After using 117MB, again no data available out of the 5GB. I phoned their techie 3 times (Justin) who continued to argue that I had again used up the data. The arrogance displayed by this support person was mind-boggling. The usage figures were emailed to me by Openweb after I insisted there was something wrong on their side. I queried usage data as there should have been at least 4GB available to me.Response from CEO was \I see the 2nd topup did not apply itself. I have loaded it for you Sorry about that". How many other glitches similar to this one"