Cancellation of registered development agreement cum GPA

Good morning sir I am from Andhra Pradesh in in the year of 2022 we have signed a mutual agreement not registered which is the consisting of construction of 6 flats out of 6 flats three plates for the owner and three flats for the builder also builder will pay 10 lakh to the owner as the construction site have the government officials LRS paid by the owner then after 1 year the builder and myself owner have and development agreement come GPA in 2023 June within that there is a clause after Plan approval 18 months the builder has to complete the construction of the flats and to be handed over to the owner but till now builder without paying the government fees he dragging the issue then more over as per the document in front of the development site supposed to be 30 feet white road but physically the road is 22 feet only as 8 feet has been encroached by other site holder in front of this site the builder know all this before the agreement and will solve the issue the help of govt. Officials but now after the long gap of 2 and half years is showing this cause and telling that he cannot construct the flats and also he is not canceling the development agreement come GPA now he is asking for an amount of 8 lakh rupees for counselling the development agreement come GPA what should I do now