Stinking attitude from call centre agents

I recently switched from prepaid to contract (I still use my old number).I app**** via VEA and received my phones(Samsung S8 + J5) on the 1st of September via courier and I noticed that sim cards for both phones weren't included and so I called in to enquire about that and I was told to buy the nano sim cards myself, which I didn't sign up for...When I checked my bill, I saw that I was charged twice for my uchoose flexi 500 line usage instead of once.I contacted customer care and I was told someone would get back to me but no one has.