MTN ********** action

I received notification from TransUnion that someone was doing a Credit Check on me without my consent or justified reason. Who gives you the right to do this, and what ********** deal are you trying to pull off. Surely we should be protected by some form of legislation??? And their contact numbers do not get answered which is common through all the complaints we have read through. MTN is a joke and have no idea around customer service...the only reason you have clients is due to MTN being one of the larger service providers in the country. I do not trust MTN with my personal details and will take legal action if there are any more unauthorized issues on my account. I guarantee I will receive the standard response to this and will not get clarity as to why they are accessing my personal information without my consent.