Vodacom
Cancel and Upgrade - EC-ZHQ1-2OVMJ5

I've been trying to cancel an Upgrade with Vodacom for 3 months now - EC-ZHQ1-2OVMJ5
Vodacom was not able to effect a simple SIM swop, and since Feb, have not been able to cancel the upgrade and refund my money.

To date I have send and received more than 62 emails in this regard. I have spent more that 3 hrs 30 mins on 16 different calls to Vodacom. I have been into a Vodashop 3 times and spent some 2 hrs there.
I am frustrated and do not know how to cancel this upgrade.
Vodacom seems completely incompetent.

People I have dealt with at Vodacom call centres;
Nathan Gershwin Faulmann
Bradley George
Faiza Golding
Bradley George
Vhutfhilo Npolosi
Lindwe Nkosi
Rihaad - Supervisor
Peace Maluleke
Tsuduka Nkuna - team leader - standing in for Jennifer Leto
Tebogo - Vodacom Direct
Senzi Nkosi - teamleader
Jackie Carolous
Patrick Simelane
Melanie Mouers
Gugu Kumalo
Olga Motsumy
Lindiwe Nkosi
Melanie Mouers
Linda Nkosi
Clearice September
Lindiwe

Calls logged with Vodacom;
Ref: 00146a8KMNCQ3JJ0
Ref: EC-ZHQ1-2OVMJ5
Ref: 0014Aa8PV1M0BN75
Ref: EC-ZHQI-2IZ6A7
Ref: S3-TP29Y-YSUM
Ref: 0014Aa8PV1M0NX36