Vodacom cancellations

I phoned the 082135 several times to cancel a data line. The retention department did not want to take no for a answer. When i asked for a reference number i was told "we don't provide reference numbers" After several attempts i think i got the line canceled after fighting with the agent. Is this how you treat a loyal customer of 30 years (with the same number at Vodacom ) Shame on you !!!!!!