A claim to terminate SPA and claim refund for delay in handover

Dear Lawyers,

I need your advice about my situation below.

In 2018, I purchased a unit from a developer which they wrote on the reservation form that completion date is Q2-2019.

Therefore, I paid 24% including Oqood fees (approximately AED 109000) of the amount of (AED 534430) at booking. Then I paid 50% of the amount as mentioned in the reservation on time.

However, when I received the SPA, they changed the completion date to Q1-2020 which I signed as well. Now, the building progress is 45% and they mentioned that completion would be in Q2-2021.

Until this time, I did not receive the DLD registration and I need to know what is the best solution in this case. I have asked them many times about it but they keep ignoring me.

I do not think they will deliver even on the time they mentioned.

Is their a possibility to get my money back, or should I wait until Q2-2021 as they mentioned?

I appreciate your help.

Best regards