Account suspended although Only Current Payment Outstanding

My account has been suspended although I am only owing the current payment for which I hadnt received the invoice and now unable to do the manual payment which I prefer. Last month on day One of the month, I received a notification that I had used up 80% of usage. I had also asked why I was only receiving 100gig when I was paying for 200gig, to which I had received no response. Their accounts department have not responded. Surely based on other reviews, the credit act administrators should intervene?!?! This isn’t ethical service/business practice!