3 contracts later still problems

Last week called in to apply for a data contract,the first sales consultant placed the order who forgot to tell me that the router i wanted was out of stock.....two days later another gentleman called to apologise that the router was out of stock and the zte was available at a different price....i asked him since it was cell cs fault why am i being charged extra he count answer me.so we can to an agreement that he would experdite my delivery......by friday i called to ask what time can i expect the courier i was told the order was still at dispatch waiting for an approval.yesterday got an sms to say it was being delivered......then at 1700 i got a sms to say delivery had failed.so i woke up and called today as to what the hell is going on......to my suprise the delivery was sent to an address i had specified and your systerm says i have two orders for delivery.THIS IS NOT THE FIRST TIME I AM GOING THROUGH THIS WITH U.AND QUIET FRANKLY IS BEC<br> OMING ANNOYING.BEEN A CUSTOMER FROM 2009 AND THIS **** HAPPENS EVERY TWO YEARS WHEN I NEED TO CHANGE DEVICES.SHARP UP OR I AM SHIPPING OUT COME DECEMBER