Simplilearn - no refund even after complaining multiple time there is not resalution

I have paid **K for cybersecurity expert course through phone calls from Simplilearn account manager and they have assured I can ask for a refund anytime if the course is not up to the mark. I have even asked to send the details of the course over mail even in those mail there was no policy for the refund mentioned. When I have reported about the issue and asked for a refund first they said you have breached the *-day policy of refund and next they said to contact the Account manager who is no more working with them. When I have explained entirely how I joined the course now they agreed they haven't explained or shared me the refund policy and now they are telling I have attended part of the course and cant refund.