Furious customer

I've arranged with Discovery to rent a car through Avis from the 14 September 2020 to the 13 September 2020. I've noe being charged 2 times on my credit card from Avis and TODAY again. I've called in last week to query the second charge and the guy I spoke to said we'll send an email to Avis to send a statement to the person (Tshepo Ntombela) who assisted me during my claim. I also had bad service from Tshepo. No one has gotten back to me as yet and there they've taken money from my account oncè again. This is nonsense!!