The same as *****sters and ****mers

I received a call from them. We have several contracts on our one account. Because I am a loyal client they were offering me more data and free minutes, with no or very little changes to the price. Off course I said yes. I just received my bill. It has increased with almost R1000. It has nothing to do with the increase they just announced. Where is the integrity? Do not trust these people when they call... They are just as the *****sters and ****mers we are so often warned about.