Vodacom ***** department's mediocre service

Last week I went into a Vodashop to get assistance on an acc message I received from the service provider. Was shocked when I got an extra statement for an unknown 063 number. I contacted customer care and was referred to the ***** department, whom I provided with all the info required for them to investigate the extra number on my acc which I have been paying for since 2016 when it was apparently taken out. Funny I have never received a statement for this no when receiving statements for the other no under the same acc via email. To my shock, the ***** department comes back to me saying the contract was taken out in 2016 & never closed, its not *****. I should contact cancelations to cancel. How do I cancel something that I never app**** for or took? The casual, see to finish cheap response leaves a lot to be desired and is so unbecoming of a company that prides itself in customer service. Having worked for Vodacom over a decade ago myself, I know how serious and thorough they are, (if still) about ' just' customer concerns. This one word response has left me nothing short of been disgusted. I hope this matter will receive the serious attention it requires.