Deaf/ Hearing impaired

My name is Jerome<br> I have a hearing problem as i was born with 0% hearing ability and with an assistance of a hearing add, i can hear noises but not pronunciation of words.<br> if someone phones, i always answer by telling them that i cant hear and to please email/sms me so that i can understand what they wont.<br> Now my problem is that i have been to the standard bank branches around Fourways and Northgate and have explained to them(Management) the problem i have and they have loaded it on my account information, but i still get multipal calls from Standard Banks Call centre.<br> I have had friends speak to them but still they phone.<br> Please can someone help me and get them to understand that i cant hear them over a phone.