Poor service from Samsung & TM Electronics

Dear reader, I write to you regarding my Samsung fridge repair. I made contact via your site and was then issued with a technician called Michael. He came through and advised my fridge main board needs to be replaced. After a week of payment, the technician called Clive came through and when he replaced the board, he realised that the main board was not the issue but instead the display board was the problem. He then took My main board and left the new main board, advised he will make contact on Monday surrounding time lines for the display board to be replaced and fitted. (my main board left my house and I have no idea what condition this will come back). When I called through (no call back received), I was advised that the part is discontinued. I was then told I will receive a refund for the part and not the call out. I feel this is not fair on my part, yes the callout fee included the technicians petrol but more importantly it included the technician finding the correct fault. (which in this case was not what was done) OVER 3 weeks later, I am still left with a non functional fridge and a payment of R2096. The T's & C's on the quote says "An assessment fee will be charged upfront on all out of warranty repairs, And is not refundable if the quote is rejected". I did not reject the quote, you just weren't able to provide me with a part and a proper diagnoses. This is in no way a fault on my side and thus expect a full refund including call out fee as no work or service has been provided as initially requested. The service from TM Electronics has been nothing but appalling. I was in contact with Avica who provided poor service, I spoke to Sagree and she obviously needs to go for communication skills.. I thought that going with a reputable company like Samsung, I will receive good service but this was not the case. I was told to come to Samsung directly by word of mouth, being in the service industry, I believe word of mouth is the best and most effective means of advertising not forgetting free. I would like to hear back from you surrounding my request and concerns. Thank you in advance S Padayachee