FINCHOICE - TAKE MONEY WITHOUT ANY PERMISSION

I got an notification on my mobi app two week ago to call in before the 15th December 2018 to confirm my debit order for December. I phone in on the 13th to confirm my debit order will stay the same as my salary will be paid in on the normal date as any other month. Just for the consultant tell me she cant do anything and she don't know what to do. I inform her that there will be money paid into my account tonight, but this is not my salary and finchoice can not debit my account tonight as I did not agree on this. I did not received any other notifications regarding debit order dates that will be changed as my normal date. I ask for a reference number as I will not keep quite if finchoice will be deducting my bank account tonight as I did not sign or agree for finchoice to do so. The consultant first gave me her name (don't know if this is her real name) as she also gave me a reference number for the call 4886 and when I ask her to confirm the number after I ask her she need to take this up with a manager who can assist me as I will sue finchoice for debiting my account without any confirmation from me, she gave me n different ref number and suddenly it was 4085. Finchoice cant even get contacted trough their contact online site.