Afrihost A***1 D7N *****ing on my ACCOUNT

good day, i have experienced two unknown debit orders from Afrihost in one day. firstly i don't have any business to do with them. first debit order of Afrihost A***1 D7N of R1542.42 followed by another one came through this afternoon Afrihost A***1 D7N of R1019.00 this has ruined my bank balance resulting on few heavy penalties by my bank FNB. if Afrihost has any business to do with me, they better present it here and tell me what services are they providing me or what contract have i entered in to with them