One3mall — Office chair ordered online[protected] wide their order #158343 but no updates,

I had orderd (#158343 of[protected] for an Office chair, Breathable Mesh Computer chair worth Rs. 999:00 with free shipping. My above prepaid order's payment mode was Paytm. This information was revealed to me after I made my payment.
After this action I didn't receive any further correspondence via either mail or via standard message. I tried to contact them many a times via their telephone #[protected] which never got answered, alternatively tried to send them an email ( [protected]@one3mall.com ) which was returned undelivered.
Today I contacted them again with their another number (found on Google) #[protected] which went through but was found busy. After sometime a call back was received from totally a different number where a person on line told me that they have cancelled my order and thus asked me to stay on line while we initiate your refund which I did and then he told me that he has sent an OTP which he asked me to share with him which I did not share. I think whoever this person was a fraudster.