Furious Customer

I'm so frustrated with this network. It's been months that I don't receive WhatsApp's, emails, social media notifications. I even went to the store to get it fixed, but it was never fixed. You guys send out sms's to us to find out if we were happy with the service received. I've said no I'm unhappy and my problem wasn't resolved, but NO ONE called me back. So why waist our time by sending those sms's!!!! Even my phone, it's not even a year old, but the letters m & n doesn't work. When I type on it, it rather make spaces. So I'm not sure if it's actually the phone that was sold to me or WHAT???? I'm very disappointed with the service I've received from Vodacom this time and I've been such an old customer of yours.