Excuses and no action

I took my Tablet To Carnival Mall for repair under the extended warranty I purchased with the Tablet on 7th December 2017. I have received a couple of calls from the shop telling me they were waiting for spares and said it will be ready in 14 working days. Nearly 6 weeks later it has not been repaired. Today I phoned the shop numerous times but no one answered the phone. I called the customer service on 0 ********** and spoke to Chantinique who said she was transferring me to the cell phone of the Manager at the shop, however I got through to someone who works for Hi-Fi Corporation. Again I called the customer service dept and spoke with Norma who said she could do anything as it was the shops problem. She promised to speak with Chantinique and call me back.........I am still waiting.