Bad Service on Upgrade

i have done an upgrade on the 28 February online, to my dissapointment, there is two line linked to te contract and we did recieve te devices with two simcards aswell, My daughter who is one device holder was assisted at the Ceres branch by Gershwinn who was very helpfull to insert her sim into the new device, little did we know she had to use one of the new sim crads that was delivered with the devices, Now we are sitting with a simcard, which is lost, because of the fact that we were supposed to use the contract data to our current devices, with an amount of R135 worth of airtime (contract) on a sim that is lost. We were informed that she can do a simswap, and when she visited the branch this morning she was informed by Franceline, a consultant at te Ceres Branch- that she can't do a simswap, but when i called in to Franceline, she informed me that she can do the simswap but has to pay R70 in order for the simswap, i have contacted the call centre to cancel my contract due to the bad service and and a consultant overpowered me to not do it, now i am so disgusted with the service i wished i had cancelled the contrac, the beauty of this is, that i moved form MTN because of their bad service just to experience the same with Vodacom