Non stop calls

I have been receiving calls from all the Toyota in South Africa non stop regarding taxis that was/has been serviced and after telling the branches that they have the wrong person the calls has now only getting worse. I have send an email to Toyota SA regarding this matter and did not receive any assistance at all. I am now starting to feel harassed at this point as they have now progressed by even calling my home number and I do not even know where they get my numbers. This needs to stop