Debit order no knowledge and losing cash

My name is Andre , there is a debit order that is going off my account about 3 to 4 times a month that puts me in the minus every month this is what SMS says , can u pleas stop or cancel it , this was from yesterday

Standard Bank: R90.00 returned to Acc. 5288 from ARCADEZONE ********** 546REF ********** . Acl bal R-959.71 2018-08-24 Query? ********** 107

I never agreed and don't have knowledge of what this is there is 3 more that is about the same here they are

Standard Bank: R90.00 returned to Acc. 5288 from UNIREWARDS ********** 536REF ********** . Acl bal R-1252.25 2018-08-24 Query? ********** 107

Standard Bank: R190.00 returned to Acc. 5288 from UNITEDCON ********** 579REF ********** . Acl bal R-1205.98 2018-08-24 Query? ********** 107

Standard Bank: R90.00 returned to Acc. 5288 from PHONE VLT ********** 554REF ********** . Acl bal R-813.44 2018-08-24 Query? ********** 107

This was only yesterday the 24 August Today at just after 7 am this came through

Standard Bank: Stop Order R90.00 ARCADEZONE ********** 546REF ********** ; R90.00 PHONE VLT ********** 554REF ********** ; from Acc. 5288. 2018-08-25 Query? ********** 107

And

Standard Bank: Stop Order R90.00 UNIREWARDS ********** 536REF ********** ; R190.00 UNITEDCON ********** 579REF ********** ; from Acc. 5288. 2018-08-25 Query? ********** 107

Pleas can u help every month I'm losing a lot of money

Thank u