Disgusted in your service and attention

I am absolutely livid from disappointment about the customer service I have received in the last 2 days. Not only have they stuffed up my contract but after some sorting my line was corrected. I asked them to call me at a relevant time to discuss the issue and correct the changes. Yet my request fell on deaf ears as I was being called over 8 times during my teaching and when I ask them to call me later I get a just two minutes answer. I’m teaching and asked u for a time for a reason so respect that. I arranged for the afternoon after having to fight my way out of another I’ll timed call due to getting annoyed. Firstly it was late and then when I answered my call got dropped after asking to wait a moment to get away from screaming children. This is undeniably the worst experience and now I’m back at square one with my line being stuffed up and off again for no reason. Easy to take my money but not to be respectful and provide decent customer service at all.