Cast iron pan bought from Amazon rusts after every wash.

Hi guys! I need desperate help, don’t want to throw this away. I bought this “Navaris” cast iron pan off Amazon last year- it came unseasoned. I seasoned with olive oil and baked it in the oven as per instructions. So far so good. But even when i washed it gently with mild soapy water, it always shows these rust specs. As a result , it has been lying unused since the past month. My question- how can I make it better? Is it going to need an oven seasoning multiple times? I recently have thrown a gone bad non stick pan, so I really want this to work well! Please help! Pretty please 😔🙏🏻