Still Unhappy

I need clarification as to why Vodacom want R6000.00 to port my number back to MTN after 2.5 months when they haven't incurred a cent loss as no equipment was received from them, and they deducted over R400.00 from my account within 48 hours of moving over. I then also find out the thy have given me a R10500.00 credit limit which I NEVER asked for, AND then inform me via a text message that there is no need to apply for International roaming anymore as the lines are now open. IS THIS SO ONE RUNS UP BIG BILLS as they just take what's owing by debit order? I'm not happy with the way VODACOM operate. Seems to be very underhanded. A very unhappy Vodacom customer. BTW - I have received calls from an 082 number but the line is always dead when answered and I did reply to the email when I saw it today!!!!