Vodacom deduction of money not suppose to go off my account!!!!!!

I've ordered a Samsung S9 coral blue what I've returned to Vodacom as I wanted a purple one they still go and deducted the money from my bank account as well as R317.00 as activation fee no I owe them R100 (((yes R100))) as a penalty fee because they've tried to deduct R317.00 on 24 July (((no money in my account))) so it did not go through. I'm years with the company and suddenly I'm getting treated very unkindly and the people assisting @ call centre also not very helpful