Worse customer service ever!!!

I was contacted by Joanna on 17/11/2015 as she was responding to my hello peter complaint. She said that they have decided to reduce the price of my repair and will send me the revised quotation on which I must make payment. On 18/11/2015 I still did not receive the quote & had to call her to request that she mail it to me. Payment was done on 18/11/2015 & I sent through the proof of payment. On 19/11/2015 I received a call from Naomi from CPT repair centre saying that she cannot dispatch the spares as the price is too low & how can Joanna quote me this price. I advised her that is an internal issue & she must speak to Joanna. When I called Hisense DBN, Jessie said Joanna was busy & will call back which she never did. When I called back Jessie said that Joanna had left & no-one else could assist. On 23/11/2015 my husband took the tablet in for repairs & Joanna advised it will take 20 mins. An hour later he was informed that the back is also cracked. The back was not cracked initially. Now Joanna cannot provide me with a solution. This is extremely unprofessional as I need to keep calling Joanna to follow up as she never ever provides any feedback. I WILL NEVER PURCHASE HISENSE NOW!