Paid overnight delivery 4days still no delivery

On 1 April our supplier told us that they have sent the parcel off,we were supp**** with a tracking number. On 2nd of April I took off to be at home to receive the parcel yet no delivery was made. When we checked tracking on the parcel the reason for delivery were no one at home!!we phoned dawn wing spoke to a lady who ensured us that delivery will be made on Saturday before one no delivery was made we called again explained to Peter the problem and demanded an answer he told us that they dont know where the package is we told him this is unexceptable the phone was put down in my ear. Called back still no answer. when I eventually got trough I told Peter this was unexcused and demanded my package to be delivered today,and asked to be called as soon as they were on their way as I had plans and cant sit around and wait for when they decide to do their job. Peter ensured me that delivery will be made within one hour were still waiting. First time using dawn wing, will never use them again!!