Money deducted without concern

At the end of March I app**** to the router for my home. I spoke to the consultant who never mentioned an upfront fee to me. 3 days later I got my router delivered at my work place, after a few minutes of sim activation money got deducted from my account, was not at home yet and ddnt even use the router yet. I called them to ask what was happening they advised me to send an email of which I did. On my 2 emails I was explaining 1 thing that I've already explained telling them to go back to the recordings and spot exactly where I've agreed on them to deduct the amount of which they failed to do so. All I was asking was for them to bring back the money they took without my concern.