hafiz i guess you missed something ...there is clear detail for IETLS band equal to what score

for listening 7.5 = 4 score
for others 6.5 = 4 score

Level Points (per ability) Test results for each ability
Speaking Listening Reading Writing
High
First official
language: 4
6.5 - 9.0 7.5 - 9.0 6.5 - 9.0 6.5 - 9.0