Appalling customer service

On the 9th of August called Dream nails the Glenn to make an appointment for 11:15 but while I was on the line I realised that I wouldn't make in time so I told the lady who was assisting me to schedule my appointment for 11:30 instead, she said that wouldn't be a problem. I got to the Glen at 11:31 because I struggled with parking I arrived at the store at 11:40. I informed the lady who attended to me that I had a 11:30 appointment. She looked at the schedule and told me to have a seat because the beautician who was supposed to assist me was still busy with a client. I waited till 12:02pm the beautician who was supposed to assist me told me she only had an opening at 01:30pm and I asked why she said because I was late by 30min and I informed her that can't be right I was late by 10 min as my appointment was at 11:30. She said on the system it said my appointment was 11:15. So I was penalised for someone's incompetence and they were unapologetic about it. I drove all the way to the Glen mall for nothing. And of course I refused to take the 1:30 appointment why must I wait for an hour and 50 min for being 10 min late.I have never been treated with such disrespect in my life.I was so stunned I literally got up and left such appalling service, very bad customer service indeed.