Bad service

I purchased a 2nd hand car with Ntt Nissan Bloemfontein, the service was very nice when it all started, upon delivery the car came with a window chip where they also gave me a voucher to fix it however it was going to be effective after 30 days within a week the window cracked through that chip, i let the sales consultant by the name of Gert know about this and he advised that i should make quotations so he can help with window replacement...in the process he started ignoring my WhatsApp messages and referred me to his manager who also promised to make payment process with Glasfit and will give feedback during the course of the day so i can go and do window replacement, he did not call nor to update me the whole day and unfortunately i was on leave in Limpopo and this was advised to him that i need to go back to jhb due to work, i have been failed as a customer and the unfortunate part is that my car has not been registered thus far Fill free to contact me on email: ***