Poor customer service and *****ing data paid for.

My contract with MTN is a data bundle of 2 GB per month, 100 minutes and 100 SMS. With the renewal for Oct 2022 I only received 1GB, 100 minutes and 100 SMS. I treid to contact MTN but with no luck. THeir so called self help scheme does not cater for the correction or the reason for the *****ing of data. I tried to send them an e-mail to *** but received a return e-mail informing me that the recipients mailbox is full and can't accept massages. This is evident of MTN commitment to customer service which does not exist. Secondly there is no other way of reaching an operator to assist with the problem I experiencing. All the numbers available is linked to their so called self help service which, as already mentioned, does not cater for a problem as what I experience.