Iphone Impossible!!!

I was due for an upgrade on my contract in Nov/Dec 2015.In December 2015 I went to the store on a few occasions and was advised of no stock this continued and I only got a phone on 3rd March 2016.A sim-swap was done I was told this would take 24hrs-5th March still had no service-I went into the store and was advised there was a system error and it can not be fixed on the weekend.I only got service on Monday 7th March-phone now had 2 charge and when trying 2 use my phone Tuesday 8th March the speaker is not working!!!Only way I am able to make a phone call is by using earphones.Furious as ever I ho back to the store for the umpteenth time on Wednesday 9th March(PLEASE NOTE THIS IS WITHIN 7 DAYS OF MY CONTRACT).Consultant advised manager will have to look at it and call me.The request was received by Iphone on 15th March.Everytime I phone Jose there is no answer and mailbox is full so no option to leave a message.My last trip to the store on Friday 18th March all I was given was excuses now been told it could take 21 days to get my phone.A brand new out of box failure which was reported within 7 days should be resolved with a new replacement phone.Highly disappointed!!!