Fraud did by network service provider

The service provider offered a recharge plan of 349 with 5g unlimited data. Initially they had good 5g coverage but recently the 5g coverage is going too weak. I had to use limited internet data My expectations for going for the 349rs recharge plan was to have unlimited data, or else I would have relied on my home wifi, but the jio service provider gave fake expectations and never revealed any condition that they would fail to provide 5g network every where. I kept waiting for 2 to 3 months continuing with the same recharge plan, but no improvement done yet. I'm now porting out and leaving the service but I need a refund of atleast 500 rs. I did a recharge of 349 rs (the same plan) but since there isn't any improvement yet, i need a refund of the recent recharge and the partial amount of previous recharge which makes it 500rs approx