Vumatel and mweb

Hi I have signed up for wifi and I paid the R399 on the 26th of April 2024 via payfast and the technician came 3 days later to do the installation, however upon arrival they requested an amount R850 to be paid to them before they could start with the installation. I then asked them two question was how did you guys came to the conclusion of R850 no measurements were conducted I know that 30 metre of cable is for free then you guys start charging for extra metre of cable used thereafter and I asked them with regards to the payment under Vumatel Terms and Conditions section 18.3 it stipulate firstly you need to provide me with an invoice thereafter I pay via EFT or online via credit card please should me where it says I should pay cash mind you that they didn't even provide me with an invoice after asking them those questions they left my house. Till today I have not received any communication from vuma nor mweb to ask why I am not yet connected I've been speaking with vuma and vuma says that I should speak with mweb and when I reach out to mweb they said that I didn't sign up with them I should contact vuma this is being going back and forth. Regards TS Khumalo