summons

In 2015 i went to nedbank to make a payment i was told that my account was handed over at smith and smith attorneys i phoned them and they couldn't pick up my name on their system and they took my details and said they will call me back a week later i phoned back and i was still told the samething and the next thing i received a letter of demand from the post office, now today in the morning at 6:10am i saw some papers on the street they were wet and when i picked the paper it was summons with my personal information, and we all know that people can take my Id number and other details and do whatever with it.