Dear Sir, I am with my recently bereaved father at his holiday – Stuart Gulliver email address

Robert  sent a message to Stuart Gulliver Group CEO, HSBC Holdings PLC – email address that said:
Dear Sir,
I am with my recently bereaved father at his holiday home in France, where my mother died suddenly just over four weeks ago.
My father needs help to active his online banking and secure key. I have phoned on several occasions, but after waiting between 15- 30 minutes at a time, no-answers my call.
I have therefore complained and asked for someone to contact me.
Since then I have received three emails passing the buck from one department to another, but no call.
It would seem the only way to get some sort of customer service from your good selves is to bypass both your complaints department and your switchboard.
I would be most grateful if a competent person would call me ASAP to resolve this issue.
Many thanks!
Julian