How to complain about open service request?

Hello,

• I raised a service request as the touchpad and touch screen freezing.  To resolve this I was instructed to re-install the OS and this resolved the issue.  In truth, this was a straight-forward and positive result.
• During the effort to resolve the above, the enter key on my keyboard stopped working properly and a technician was sent out.  The technician replaced the keyboard and testing showed the issue was resolved.  A seemingly good result as well.
• I then found a few hours later that during the repair of the keyboard, the fingerprint scanner was somehow broken by the technician.  It had worked perfectly up until the technician replaced the keyboard on the machine.
• I then had to book a subsequent technician visit.  The new technician replaced the fingerprint scanner and testing the fingerprint login showed it now worked again.
• I then found out a few hours later that this second technician had broken the power button functionality.  
  • The button clicks very loudly every time it is touched (even softly)
  • The button often gets stuck after being pressed
  • The button requires incredibly hard force to activate the button.
• I raised this back with customer support and after waiting a week I am told the only option is to now surrender my laptop for a minimum of 14 days.
• I reluctantly have agreed to go through with this as I'm told there is no other option.  In my response I also asked to formally escalate my issue into a complaint because after a month of dealing with Dell fixing one problem and each time breaking something else, I now have to lose my laptop for a significant amount of time.  I use this laptop to run my business and now have to find someway to continue running my business without it due to the very poor technical repairs received.
• Your customer support person completely ignored my complaint in his response.