Basic lack of service

Logged numerous requests to MTN to have my statements emailed to me monthly. It has been more than 2 years that I received an automated email from MTN and repeatedly requested for this to be corrected. Every time I call them, the same excuse is used, We moved to a new system blah blah? any system should at least cater for the basic requirements other than billing which is the most efficient? My latest request was for October 2020 which is Not on the system according to the agent, therefore they just send me the September one?