No Help at all

I gave my Samsung Galaxy 5 mini in at Menlyn repair section as the signal keeps disappearing and I have to restart my phone or turn flight mode on and off in order for signal to return. During this time no phone calls or massages can be sent or received. As I am a professional I need to always be available to my employee and clients.<br> The lady that took my phone said the technicians will test it and if they can't repair they will send it to Samsung for repairs and I will be notified of such issues. She stated that this is a common problem with the Samsung's. I was never notified of the whole process. I had no idea of when the phone will be back and for two weeks I was without my phone. I phoned after a week to find out what happened. They said it was sent for repairs to Samsung. After twee week I had to phone to find my phone just to find out that they had done nothing to repair my phone and stated that nothing was wrong. The service counter could not tell me what they have done. Bottom line is, my phone is worse than ever and no help from my service provider of which I have been a loyal member of more than 5 years.