Izingapro sports unpayed full quotation for event booked

Hi my name is Thato currently working as an Emergency Medical Event Support consultant. Izingapro sports and Management requested my services for a period of 8 weeks which in return they failed to pay me the amount in full as agreed and confirmed in the contract between them and me and I tried calling and sending Emails and text as part of communication but they haven't responded.I will appreciate if you could assist me with this query because I have been doing this business for almost 3 to 4 years this is by far one disappointing private company I have worked with cause I used my petrol, equipment and have to pay my medical assistant how does one grow and be the best in this industry if such companies continue to play games with people's emotions and passion.looking forward to hearing from you. Regards Thato