lack of good customer service

I was at the PNA stationers horizon store in roodepoort as i went to the store there was no one to welcome me as was looking for assistance i saw a lady who happened to be standing at the till i went to tap her seeking help she turned with an angry face asking what i want and why am i tapping her shoulder she's suprised i then told her i need stationery she then said to md with a bad attitude give me the stationery list i then gave her and told her some of the thing's ive already bought out of the list,she then asked me to point out what i want i then showed her on the list again with the attitude she asked me to point out what i exactly want i heard to push the trolley myself we then got on the section of maths sets she then again with an attitude asked me which one i want then i said the cheapest she then to a seat threw it inside the trolley then i had to push the trolley to the till myself i then asked for the store manager and told him I'm not happy with the service she advised me he will sort it out i showed her the lady he said he'll sort it out,as a customer i expect to be treated fairly with respect and a great customer service which i ddnt get at that store,I'm so angry i hope this will be taken up