如果人家已经帮助你了,你可以说: I'm so happy for your help. Thanks a lot for your help. I couldn't be more happy for what you've done for me. You made my day today. ...... 100%正确!说的没错,写也不会错。
你这句话一读起来就感觉怪怪的哦,典型的Chinglish,其实你不必纠结于这句子是否正确,因为没有人外国人会这样说哦。我觉得可以把这句话改成if 引导的条件状语从句,If I get your help I will be very happy 或者就说,I really appricate your help。