Rude Cashier!!!

I went to Pick n Pay Liquor in Birch Acres Square where i purchased a bottle of Collins dry Gin which came with a complimentary mixer(Tonic.Lemonade etc) so because i prefer Tonic..i advised the cashier that there wasnt any tonic but Lemonade and asked if she can replace it either maybe with a different brand of tonic or something as i dont consume lemonade...Her name is Paballo...she started yelling that she cant do anything about it and i just had to take it or leave it...Paballo was very rude and couldnt even explain to me in a respectful manner..im never going back to Pick n Pay Liquor in Birch Acres Square!!!