Pest telemarketing, has foreign accent, I hung up

These people sent me an email with an attached audio file. How did they link my email address to my personal mobile number? Scary stuff!

Caller: I don’t know

Spam call. They called twice. I didn’t answer. Didn’t know who or where they were calling from.

This number turned up as an email voice file. I used my phone to open the audio, it was only 3 seconds, but sounded like a call centre in the back ground. It pass goolge.mail, but I reported it as spam.

Caller: They said about electricity

I said i wasnt interested just switched electricity companies. She then proceeded with an irritated tone to tell me im not selling ypu anything . I said im still not interested and dont use that tone with me. I then hung up and blocked the call and she has proceeded to call a further 5 times in 3 hrs.... as blocked it just tells me they called but doesnt ring through to me.
Harrassment plain and simple