Signal Fluctuations & Whatsapp Bundle Problems

It's been more than a month now that I've had terrible signal fluctuations, making my Blackberry Z10 lose data connectivity to the point where I often have to walk around with my phone before a connection is reestablished. This is occurring on three different handsets, with three different SIM cards, so it isn't my phone OR SIM card. That's gripe no. 1.<br> <br> The second issue I (and other locals!) have is your so-called Whatsapp Bundle. I have lost over 50MB worth of data in two or 3 days thanks to the bundle not functioning as stated and this to me is unacceptable. When I send or receive pictures, audio or videos, I am being charged to my data bundles as well as my free airtime! Right now I am without data or airtime and seeing as whatsapp keeps using it, I don't even want to load more airtime! What's the use of a 1GB \fair usage cap"if I can't even receive these files from my contacts?! I have lost 400MB this month due to BBM not functioning properly until I updated the app"