Unauthorised and ******** deduction on debit order

CSS Tactical has without my authorisation deducted an additional amount of R170.46 on my debit order.<br> <br> I have pointed this out to them in writing but they refuse to correct the error and to refund the R170.46.<br> <br> CSS claims the additional deduction is for surveillance cameras but there is nothing in the contract between CSS and myself about surveillance cameras only armed response, nor did I at any point request or agree to have any surveillance cameras as part of the contract or the services provided in terms of the contract.<br>