Unathorised debit order from my bank account

My name is Harry Guys and one consultant from 24/7 ASAP called me once to introduce their service to me and I informed them im not interested and but they continue telling me to test the service via my cellphone but I never subscribe to the service nor did I gave them authority to deduct money from my account. I need all the money back which was deducted from my account. My bank debit order shows: 24/7 ASAP TSTG050239 . I have a tracker and it seems the company is working with Tracker as I never gave them my bank details and they can go and review their recording tapes of the conversation as this is clearly ***** by their sales consulatants to generate income for themselves and should be held accountable for bad business practice.