Disappointed, Poor Service from a Brand I thought I could trust

I am very upset and disappointed with inconvenience these guys has caused me, Mercedes-Benz Cape Town Fores**** poor service not up to the "Mercedes-Benz standards" as we would assume. Car was advertised last week I saw in www.cars.co.za (Polo vivo 1.4 2019 trendline) went in the branch to see the car signed a quote with sales consultant I told them am going to do my own finance as I work in the bank and would like to take delivery that on Friday. I have done everything to make sure that the transaction goes as smooth as possible and sent everything that they have requested. This morning the bank requires the invoice and these guys are telling us stories. Am not sure why the car was advertised if it was not for sale. I took my time and effort looking for finance for a car that is now not for sale? I was going to be phoned by the manager David before COB but now it's 5pm and no one called me. This is a second time am experiencing such Poor poor service now I don't have transport because of you and you inconveniences. I hope you learn that make sure everything is to the T next no one wants to be disappointed like this.