Poor Service

A cashier at Pep put a wrong reference number paying my wifi and when I go to rain offices they are telling me they can’t assist me and when I call the call gets dropped. The reference number is short with one number why is it not reflecting on their system that an account not existing was paid now I’ve paid twice for one month. What’s so hard in checking the reference number used to pay the account if it belongs to someone then who so they can be contacted? I’m very disappointed in their service especially in Roodepoort cause I went there and no one helped me and head office is also useless