Billing details CHANGED 3 TIMES

I have 2 accounts with Altech, one 3g and one mobile.<br> Both these accounts are debited off my credit card every month.<br> My credit card was ****** and I called in August last year to update my details for my accounts.<br> I then moved overseas and my cell phone was debited off my credit card and my 3G was not as my details somehow where not updated at the same time.<br> I now have a FInal letter of demand for my 3G payment because of your incompetence to actually provide customer service.<br> So now I log on to pay the amount, but my cell phone number is now not working overseas and I cannot add a beneficiary because I cant receive the RVN pin from my bank on my cell phone. I cant change settings without my cell phone working. SO WHAT WOULD YOU LIKE ME TO DO... HOW CAN I PAY YOU.<br> I am so angry that you make this my problem because of your inability to provide a service.<br> I cannot wait to end my contract soon...