Using WhatsApp to spy on your calls? No. As others have said, it is very secure, which is why some governments ban it.
However, that doesn't mean that your husband hasn't installed other spy software on your phone, which could be perfectly capable of recording your phone calls, location, or other actions, and sending those to him (perhaps using WhatsApp, Email, upload to the cloud, or any other data transfer method).
This is why posters above are suggesting you either wipe your phone (factory reset) or get a new one.
Do you have any actual evidence that he knows information that he could have got only by listening in to your calls? If it's just the online status in WhatsApp, then that's not a lot to go on. Perhaps make a phone call and say some falsehoods (like you're leaving the country, remarrying, pregnant) and see if he reacts!