Disappointing customer service experience

I want to share a really disappointing customer service experience received from Dischem Retail Crossing. I went to Dischem Retail Crossing today to get medication for my 4 year old child. We had just come from the Dr and went to dischem to get medication. When I left the store I attempted to call an Uber to take us home only to realise my battery died. So I went back instore to buy a power bank forgetting these things do not come charged. So I asked the security guard at the door if they can help me charge my phone just enough to call an uber, the guard sent me to customer service desk and the lady there told me she needed to speak to her manager. Her manager came and basically told me they cannot help me. Even when I told him that I just bought the power bank but it obviously does not have power and I just need to charge enough for me to call an uber. His response was that it is not allowed, not even staff is allowed to charge their phones. I had my charger, even my adapter but they would not let me boot up my phone. Needless to say that I left the store utterly disappointed and had no courage to go to any other store not wanting anymore disappointment. I had no other option but to walk home with my child a 3/3.5km distance. Now if it was me alone I probably would not care so much but that distance for a sick 4yrs old was not nice and I think that is what hurt me the most. I could not understand what could be so bad that they would not be willing to offer any assistance. It's not like my charging was going cut off the power for the whole store or put a virus in their sockets. This is very interesting policy to have not that they owe me any explanation but WOW!!!

Quiet frankly I do not think this review deserved any star at all!