Bad attitude and messed up my line

A telkom technician came to put in a new line for our Neighbour, but needed to get onto my property as the pole is apparently in my yard. I agreed to give him access. Within 10 minutes of him working on the pole both my telephone and Internet lines were no longer working. I notified him of this and he asked me to be patient he is still working on it. I then asked him why are my lines being affected if he is putting in a line for the Neighbour. He ignored me and didn't answer. He then left and went next door. I called the neighbors and asked them to notify him that my lines are still not in working order. He complained, moaned and said it's not his fault my lines aren't working it's our own fault, he didn't damage anything. I was utterly shocked and dumbfounded by his response. I could not reason with him. Our lines have been working 110% for months without any problems, suddenly he tampers with the lines and box and it stops working and he refuses to take responsibility for it. He says we should call Telkom for them to reset our internet and according to him after testing, our line is working. Which is not the case. I'm SHOCKED and cannot believe his attitude.