Assuming April 2014 to April 2015, 2 years . Note the time frame on notice of cancellation and payment of installement.
Quoting salient provisions from the Maceda law RA 6552:
Entitlement after payment of at least years Section 3
“In all transactions or contracts, involving the sale or financing of real estate on installment payments, including residential condominium apartments but excluding industrial lots, commercial buildings and sales to tenants under Republic Act Numbered Thirty-Eight hundred forty-four as amended by Republic Act Sixty-three hundred eighty-nine, where the buyer has paid at least two years of installments, the buyer is entitled to the following rights in case he defaults in the payment of succeeding installments:”
On Cancellation Section 3 (b)
“If the contract is cancelled, the seller shall refund to the buyer the cash surrender value of the payments on the property equivalent to fifty percent of the total payments made and, after five years of installments, an additional five per cent every year but not to exceed ninety per cent of the total payments made; provided, that the actual cancellation or the demand for rescission of the contract by a notarial act and upon full payment of the cash surrender value to the buyer. Down payments, deposits or options on the contract shall be included in the computation”
On Cancellation of Contract after 30 days from receipt Section 4
“In case where less than two years of installments were paid the seller shall give the buyers a grace period of not less than sixty days from the date the installment become due. I f the buyer fails to pay the installments due at the expiration of the grace period, the seller may cancel the contract after thirty days from receipt by the buyer of the notice of cancellation or the demand for rescission of the contract by a notarial act.”