Unacceptable and unprofessional service

Good day to Online car parts I would firstly like to say that the service rendered via phone call with a particular consultant is not up to standard. Training should be held in this matter of concern. Secondly I have asked and ordered a car part for my car as it is for my own safety that my car needs this part as i am driving far to work and back. The 17th of December 2022 i called and asked if this particular part is available and it was told to me that it will be ordered and ill receive it. I have been going back and forth with phone calls due to this is a matter of urgency (life or death) this has still not been resolved. I was told on the 6th of January 2023 that the part will be delivered to me after payment was made, with a driver from your company on the 7th Jan 2023. I have been phoning numerous times for updates when is the driver coming out to deliver the part, there are many excuses and promises made but no action. The consultant knew that the company is trading till 2pm and as well as Sunday not traiding. It was told to me after i called again after todays traiding that i will receive my part tomorrow. This is truly unprofessional and unacceptable. I would like to know by the company owner or manager what steps will be taken in this case?