As said above you only get one mum-dad. Why dont you arrange to meet up with him,why your there give the money back and explain why you cant except it!!! And also try to sort things out between you by telling him how you feel. Dont use him for the money ,you cant buy people!! Im 28 now and ive not seen my mum since i was 23 ,i did try to sort things out back then but we dont get on atall so im better off without her in my life!!
Maybe its time for you too open the door mate (we all make mistakes)