Im very unhappy with MTN I

Im very unhappy with MTN I don't know what happing with service. This is not the 1st time I'm having this problem my data is disappearing. On the 22/09/2015 I went to bed at 21:00 I was left with 600mb on my account I switch off my mobile data when I went to bed. The next day I went to work I did not switch on my mobile data I connected via WIFI at work I get an sms advising me that I'm left with 100mb when I call customer care 808 I was advised to call 1555 they will help me with my data problem I then called 1555 which they advised me to call 808 to log a billing query. I then go back call 808 they advise me that the reason for my data depleting is course I have a wasp service activate on my account it tacking off my data before I call 808 did dial *141*05# to deactivate wasp service I got an sms saying I'm not subscribed to anything the guy that helped me the second time 808 department said I had wasp service I told him I don't have any if I had it will tack off my airtime not my data that the wasp service that I know he then told me to call the company that is tacking my data I told him I won't be able to I don't have the airtime as my service provider they need to do somethin