Is SAMSUNG/Unitronics still in Business

I put a star because this won't allow me to type before selecting a star so that star is not the true reflection of how I feel. I took my A5 cellphone to Samsung in Tygervalley for screen repair THE FIRST WEEK of January. Few days later received an invoice/qoute from Unitronics with an email stating that for them to touch my phone I must pay first and I did immediately R2747.40, 9th January . Till this date I haven't got it. I have walked in ("waiting for repairs that are coming in few days, we'll call in 7 days" and they never call you back), sent emails for feedback (no reply), calls (they never pick up or pick n drop) What is going on, why Samsung is having /associating their name with this *****? It is a nighmare. I went beginning of last week I found a guy who was dumbstruck as if he just woke up. When I asked to cancel he said he would send me a form, haven't received that either. I wish I knew that I was not living my phone with SAMSUNG rather with Unitronics. I should let lawyers handle this