I'm so dissapointent and angry

Good day,I would like to address my issue with you. 2017/2018 my Dad was on my medical aid and he went to a procedure than they phoned me telling me that there is R2500 amount balance and they phoned my Dad because he is the one was using medical aid and he promised to pay as told me now when Im trying to get a home loan I've been declined due to a Judgment if I enquire about it it shows that it's for Drs Beck Danchin & Partners if i phoned them and questioned them how com you put a Judgment on my name without informing me they say they sent the summonies and i asked them who signed those summonies because i did get anything from you guys and the lady says it was signed by Samke Khoza i told them i dont know anyone by the name of Samke Khoza they say it's my cousin and to be honest i dont have any relatives by name of Samke Khoza on my mothers side and my fathers side so now im stuck with this Judment which they didnt inform me about it. All im asking is that they must remove the judgment on my name so that i will be able to make arrangements with them beacuse its affects my credit report as im in a need to buy a shelter for my kids ASAP. Kindly assist me