Poor Service and No Care Attitude

I booked a flight for my mother-in-law for the 1st June with my credit card. Flight JE273, seat 32C, gate C12. My mother-in-law did not have luggage so we used the self service check in. My mother-in-law was not allowed to board the plan as she needed the credit card. Self service did not block me or ask for credit card on check-in. I had already left the airport and they asked her for the credit card when she was ready to board. Mango made no attempt to call me telephonically. My mother-in-law indicated to mango staff that she is a chronic medication patient and they did not care or did not try to help her. My mother-in-law could have had a serious heart attack or something. Mango your service and customer care is pathetic. When I got to the airport my mother-in-law was left at an unattended mango counter. There was nothing we could do as the counter was closed at 8pm and the staff gave us a customer care number to call that was also only available the next morning. Your staff customer care is pathetic. I will not use your airline again. You do not know how to treat customers. You are not doing me a favour, I paid for your services.