Reliance Jio Infocomm — unwanted recharge in my number

My jio no is [protected]. So here is the thing i received several messages from jio that my current plan will expire on 28th april 05:55 pm. So i'm like ok whenever it will expire i'm gonna recharge with a new plan. So tomorrow was 28th april and even after 05:55 pm my internet was working.. I thought maybe it will continue till midnight and after that it will stop. So i woke up 29th april morning and my internet is still working... Now i'm like what is going on. I open up my jio app to watch my recharge history and then i saw there was a recharge on 27th april midnight if rs. 102 with a promo code recharge i don't know what is this.. And didn't get any message. Then i tried to call your customer service no. But the system is totally messed up. So this is my question how is this recharge triggered and why?