INCORRECT SMSES & CALLS!!!

For about 2 years now I have had countless smses and phone calls from FNB saying I owe them money but the person they are looking for is a man I do not know so every single time I told them please this is the wrong number my own account is by FNB and I use my own number for cellphone banking ext so how on earth is it possible that I am 2 people, today again I got an sms that that man don't want to mention his name is handed over to some attorney so now the result is the attorneys is phoning me as well and I have asked so nicely numerous times to please correct this but still nothing now I ve had it