Deactivation of simcards without warning!!!

I had several prepaid numbers with CELL C. Some of them has just been permanently deactivated after I bought 10GB on a year validity on their website. Their customer service told me to call legal at *** in the morning to find out why. I am seriously getting ****ed off with CELLC offerings that just do not last. THis is not the first card. It is an ongoing ****ty issue with other cards as well.