Poor SERVICE from Hollard /Insurance Supermarket

On the day I bought my new car and I needed insurance before I could drive away my car the most affordable insurance I could get were from Hollard via Insurance Supermarket, the premium were high so I shopped around for a more affordable insurance, My Way gave me a real affordable premium, with this change My Way canceled my insurance from Hollard/Insurance Supermarket, since the 19th of april we struggled to get a cancelation letter from Hollard/Insurance Supermarket, last week a consultant contacted me to confirm the cancelation as I told her that the delay in this process will cause me to pay the premium as well as the My Way premium where she told and promised me that it won't, so it did happen and Hollard /Insurance Supermarket took thier premium from my account, this morning my fiance tried to speak to Hollard /Insurance Supermarket for them to repay me the money, after a long hold on thr telephone and several emails we had no feedback from Hollard /Insurance Supermarket, to pay an amount of R722 for a canceled insurance is totally unacceptable