Bad customer service

Good day

I trust you are well. I don't like the service that I always get at pick n pay Kempton gate mall. This is the 4th or 5th time I am experiencing the same problem.I went to withdraw money from sassa today which is R480, they said they don't have money,I didn't have a problem because I went there early 9:08,after 15 minutes the other person went to withdraw money for close to R2500 as it was for different kids but did get the money, I understand maybe after I left people paid more money, around 10:24 I went back,before getting inside the shop I then i came across to the person who where given money(R2500) after me, I explained what happened, it's where the person told me that she did withdraw her money & all of it,she said let's go.wen we get there all of the tellers said they don't have money, we waited for few minutes then the woman went to the teller and ask her if the money she has it's R480 she then said I'm giving the money because it's you.then she called me to come and get the money.so my question is am I not the customer,why do they choose who to assist,yes I know they know the lady very well but customer service doesn't say help only people you know, I am so disappointed because it's happening for several time, if only I had another plan I was not goner go back, the reason for me to withdraw inside pick n pay it's because the card is giving me a problem when I withdraw at atm, as I am waiting for me to get time to go and change my card because I don't want to be treated like this everytime when I withdraw with sassa card,the ladies look at us like we don't deserve the sassa money, or there is something wrong with us getting it,and funny part is I was not going to withdraw only, I bought food as I buy every morning because I work around, so for me to get the best service I need to be friends with the stuff?