Call centre hangs up before helping

I just called MTN's 808 helpline, looking for a service which, which doesn't work as described on their website. First I get told that they are experiencing high call volumes - No MTN, you have too few people in your call centre. I then hung on for a while, listening to all of their marketing info and other useless information and jingles that come and go and then had the call hung up on me.