MTN NOT PORTING MY NUMBER TO A NEW NETWORK

IVE BEEN TRYING TO PORT MY MOTHERS PHONE NUMBER FOR THREE WEEKS FROM MTN TO TELKOM ,MY MOTHER HAS BEEN INTO TELKOM TWICE AND ON BOTH OCCASIONS TELKOM SAID YOU HAVE TO 1-3 DAYS FOR MTN TO AUTHORIZE THE PORTING OF THE SIM CARD WHICH THEY HAVE NOT DONE. I HAVE CONTACTED MTN TWICE AFTER WAITING A WHOLE HOUR ON THE PHONE FOR A CONSULTANT NOBODY COULD EXPLAIN A SIMPLE QUESTION OF WHY THE SIM CARD NUMBER HAS NOT BEEN PORTED. I HAVE DONE THIS PROCEDURE FOR MY MOM AS SHE IS ALWAYS AT WORK AND UNABLE TO DEAL WITH THIS AT HER AGE, AND DURING WORKING HOURS. MTN SIMPLY DOES NOT WANT TO PORT MY MOTHERS NUMBER AND WANTS TO KEEP HER ON THEIR NETWORK AND GIVE A WHOLE LOT OF STUPID EXCUSES, THIS HAS BEEN TAKING FOREVER AND MY MOTHER STAYS FAR FROM ME AND I HAVE HER CELLPHONE WITH THE OLD SIM CARD, I CANNOT CONTACT HER BECAUSE SHE HAS THE NEW SIM AND IT IS WAITING FOR HER OLD NUMBER TO BE PORTED. UNACCEPTABLE NON SERVICE FROM MTN IT IS PATHETIC AND INCONVENIENT