Manager aggressive and very arrogant, in his manner of treating me as a Pensioner

Vodacom Cresta - Requested over 2 weeks to port my telkom number, 1st They gave me a "Promotional Sim card" which did not WORK. Went back 11 Nov 23, got given another sim card, STILL waiting for the number to be active! Went to Vodacom Shop this morning and spoke to Nanthi (Supposed to be a manager, Which I have my doubts). He was aggressive and very arrogant, in his manner of treating me as a Pensioner, when I explained everything. HIs attitude was " Our card work that is all we do????. I went to a Cell Shoop bought a blank Vodacom sim card and inserted into phone AND IT WORKED. Went back To Nanthi and explained this, but he could not care a damn and Refused to be of assistance. Shame Vodacom!! =