MM ALL ELECTRONICS - Bad service providers

I requested their services sometimes 3 months ago and paid a call out fee, they came and did half job, my filter has been out for months and it was part of the things that was wrong but they did not borther with it, i was under the impression that when they leave the fridge will be in 100% working condition. or if they need to go and buy the filter they will tell me when they can come back for that. they have been missing in action, even after few attempts to communicate with them on their watsapp and Email.