Fnb untruthful

Ive kindly lost faith in there dealings and service delivery. My first complaint is about the fact that they canceled my card during a process of investigating and me logging a query and no one has issued feedback since the card has been blocked . I was at a store and did a purchase to find out my card does not work . Secondly I purchase a fnb connect simcard of which 25gb of data I received a portion if the data last month and I assumed I received 25gb or data and found myself out of data 10days into the connecting service . I queried the issue and was advised I used 25gb in 10 days . I have a other business number of which 25 gb is issued that does not even run out in the month and technically the same or maybe even less frequent usage was used on the new sim card . I would like to fnb to verify how we used up 25 gb and where is the top up data for this month's cus clearly someone is *****ing from me