Poor service by Vodacom HQ staff

During June 2018 Elite Mobile contacted me and offered me the Smart S package with 1 Gig data at a reduced monthly cost of R154.50. The one phone no. ********** 305 was changed to the agreed package without any problem. The second phone no. ********** 536 was changed to a Smart S+ package without my consent. After many queries by mail and phone with Vodacom they eventually changed my package to the agreed package during October 2018. I today received my account for the end of November and Vodacom is charging me a R500.00 migration fee! I paid a R150.00 migration fee in July. Why should I pay a R500.00 migration fee for Vodacom's pathetic service. If Vodacom staff did their work properly from the start this would not have happened. It seems as if the Vodacom HQ staff are not trained properly or is plain stupid!