DNS is not my website host. Stuck!

My domain name is registered with Namesilo, but my hosting is with iPage. So in the NameSilo DNS Manager, I have iPage set as the NameServers. When I go into Namesilo to change the MX records, it tells me I cannot make any DNS changes unless I change the NameServers to the NameSilo defaults. If I did that, I assume my domain name would not get forwarded to my host iPage, and my website will thus disappear (?). Is there some work-around to this ? Or will I never be able to use my domain name in my Zoho email address under this set-up? Thanks for any help!