Hi. Sorry to hear this. If your father can speak, best to ask him first on what he wants. Especially burial or cremation.
Next is whether you are Hokkien, Teochew, Hakka, Cantonese, etc. As some elders may want to insist on following certain customs. Clarify first, don't follow blindly.
One member pointed at ktc, a good recommendation, also one of the cheaper one. There are others like Jing An Memorial Village, etc. They can recommend undertakers (coffin and funeral arrangements).