You need to ask Sunway to appeal and provide emgs supporting documents from Registrar of Sunway. Why Sunway gives you offer letter if your school certificate is not recognized by MQA? Alternatively you can write an email to MQA requesting them for equalincy letter thus you can appeal to emgs.
Thank you for information, so I wrote to my institution and waiting for the answer now. So I doesnt know why they give me offer letter but they needed an O-level education and told that I am eligible for study