need help

Two of their consultants called us and said they are updated our information for Telkom /Yellow Pages we must complete the form and send it back, nothing was said about a payment. We have just received an invoice of R9540.00 for what exactly i also don't know and they are harassing us to pay while they consultants never told us about any payments. Consultants Names are Siphamandla Sishi and Matsiditso. Stop ******** inoccent people.................. Please help- am experiencing same thing