fibre installation

i have requested vodacom fibre at my house and the guys who di the installation left the cable exposed, i called the came still it was exposed when they left. Still i called again they still left the cable exposed and when they dig they dug less than 10cm and i am told the is nothing they can do, my area is rocky and their company do not provide them with jack hammer,so they cannot dig any futher. so even now the cables are still exposed which means if the kids in my complex play they can remove the cable. and also my internet connection was slow for the whole of september and i have been complaining to no resolve, i just get told they will log a call and i do not get any feedback. my query was closed while my issue is still not resolved.