MTN Missing DATA

URGENT HELP PLEASE 1 My 353Mb of data from last month has NOT been reinstated. 2. The problem this month is more severe

As of 5th Apr 20222 Y'ello, you have been credited with 50 Minutes, 50 SMS and 1000MB Data. Please dial *136# for detailed balances. Checked 5th and total as indicated, NO carryover from previous month. Checked on 7th using app and it said I had used about 450Mb Checked detail and only 72Mb used (about correct) Checked using *136# and 640Mb used. OBVIOUSLY your systems are FAULTY. My actual usage is a max of 73Mb

Please ensure that my ****** data is replaced and your systems are corrected.