Proper line or numbers I can use to get the information I want

I have been failed yet again last week by vodacom after calling Porting services requesting proof or evidence that my number was **********ly and *******ly ported. I went to a Voda shop which referred me back to porting services. They gave me a number to call the ***** department which doenot work and another for forensic which kept on dropping my calls without any option that Wil put me through. All I wanted was a direct line where someone will provide me with proof of my number being unused by me for the period of time it was *******ly ported. Purchases were made during that period in my accounts during that time and can't provide such evidence. CAN SOMEONE PLEASE HELP WITH DIRECT INFORMATION OR NUMBERS I CAN USE TO CALL WITHOUT HAVING TO WAIST AIRTIME HOLDING AND THEN DROPPING CALLS ON ME PLEASE