Reliance Communications — 4G data wrong bill

Address:

Coimbatore, Tamil Nadu, 641019

I purchased 4G dongle two months before in that time I'm in 24gb scheme 3g I asked this will continue in 4g or it will change?in store they replied same scheme will continue but after I use upto 8gb bill came 5600rs I asked they say ur scheme changed to 5gb but no intimation given to me through email or sms. Then I asked to customer care they said we will change your bill they send rebill for 630 in that time also I ask here after any problem Will araise they replied nothing u can use 5gb at 1100 rs monthly but again I get issue data connection cancelled due to over due I said last month I solved again y u cancelled my data they said last month your bill weaver balance to pay then only u can use data I spoke to 20 more customer care member's but no use I visited store their also no use last month fully I didn't use my data but this month bill came 1100 total pending 4500 .I used Reliance data for past 3years no problem bill also paid in right time but this last three months I suffered lot due to 4g data worst service idiot's tell wrongly about plans i'm suffering i can't pay for other's mistake give me solution for this problem