Markham / TFG - very poor standard of customer service.

I am very dissatisfied with the customer service for online shopping and stock availability. On 27 November I visited the Markham store at Promenade mall, Mitchells Plain, and I was given a brochure in which I saw the Sony Xperia XA1 on sale for R1799.00. I tried to purchase the cellphone online but could not find it online even though it is available in the brochure which I have in my possesion. My attempts to get assistance from the customer service call center and online shopping support was a waste as well. When asking the agents for assistance with stock availability, and which store, they could not assist me as they needed a stock code - now how are customers supposed to know what the stock codes are??? It is for this reason that tracking stock items by make and model number along with the relavant stores where the stock is availabe will be far more effective in assisting TFG clients. I work in the I.T. industry myself and I cannot understand why stock cannot be tracked or found, based on make and model names in the relevant application and database used by TFG, or are the relavant engineers responsible for looking after this system to lazy to facilitate this? This further results in a waste of money and airtime having to call around to all the various stores just to find this one item, along with this comes the issue of calling certain stores and they do not answer the phone - surely there must be a better way of doing this - or do the relavant engineers responsible for looking after this system do not have a better way of facilitating easier accessability so that customer service call centers can actually assist clients by tracking stock items by make and model number along with the relavant stores where the stock is available - this would be a far more effective means of assisting TFG clients, as well as having a system in place which is also far more effective in allowing customer services to render this level of assistance. Please advise on a solution to this issue at your earliest convenience. Thank you.