Confused, very confused

<p>Have been with Mweb for some 10 or more years. Paying R145 per month for 150GB capped ADSL. Have been very happy with this. Now, all of a sudden, out of the blue, I get an email saying oops, sorry we should have been charging you R175 EXTRA for the line rental and this will be billed from March. They say they will not be back-charging me (I should think not!). How can this be? It's like buying a car and paying an installment of R5000 pm only to be told some years later that it's double that! Are Mweb in financial trouble and are trying to bilk their customers to fill their coffers. Do I just have to *** en betaal?</p>