***** standard bank

I'm gaby have been banking with standard bank for 4 years. ..my first relationship with the bank is when I opened a savings account which ended up having Unauthorized n non reversible debit oders. ..I then changed to a cheaque account where I'm having unknown card purchases which does not give notify me...I get alerts for all my transactions ...and don't get notified for all these unknown card purchases. .how's that possible? I think it's an inside job I'm very dissapointed. .and planning on changing to another bank