"Terrible care for my elderly mother"

My elderly mother was was admitted into AU1 at the Kirkcaldy Victoria Hospital overnight recently. Initially via Ambulance into A&E with an acute and worsening episode of back pain. I cannot fault the treatment from both the Ambulance crew and staff in A&E at the Victoria Hospital. However, once my mother was admitted into AU1, the overall care given dramatically declined. So far as to the point that she was left unattended for 5 hours after admission without any form of pain relief, suffering considerably. This part is not the worst of my complaint.

During her stay she felt a staff member instantly wasn't very nice and abrupt to all patients in the bay. During my Mother's stay my sister and I both kept in contact with my Mum's condition via telephone calls. This aspect worsened later. I then went  to visit my Mum in the hospital 2 days later at approx. 1915. As i went into the bay that she was in I noticed that she wasn't there, so i enquired with a N/A who looked it up for me and said my Mum had just been transferred to Glenrothes Hospital, no more that 15-20mins prior to me arriving.

Concern 1: As stated above. It would appear that no pain management was given for the 4-6 hours of when my Mum arrived in AU1.

Concern 2: No one had even attempted to call my sister or myself to advise either of us of the transfer. I understand it was a late decision and these things are bed driven. 

Concern 3: Equally and more alarming to me is that she was not administered any form of pain relief prior to the movement and transfer to GH. This created a considerable amount of distress, pain and worry for my Mum who has a high pain threshold but clearly her pain wasn't being appropriately and suitably managed at this point?! Where was putting the patient first along with patient care and well-being. 

Can I ask why did this happen without any discussion and confirmation with the family? I clearly wasted a journey from my house to Kirkcaldy, that would have only taken me less than 5 mins if I had known about the move.

I'm naturally very concerned about these points that I've raised around my Mother - however, what worries me most is I don't think that this is an isolated incident. All staff in the NHS work very hard and I genuinely hate to write this complaint, in my 16 years working in the NHS, this is my first -ever.

Please can you assure me that no one shall be treated in the same way as my mother was. Patient care was non existent at vital times.