I do not understand what you mean about payments ? Do you mean that payments towards the car (HP or PCP) were not included in your expenses? And, because your dad is buying the new one, you will not be making payments on the new car ?
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
If you have sold your car the proceeds were probably due to be paid into the IVA pot, unless you got permission from your IP to use the proceeds, together with the gift from your Dad to buy you a newer model.