Telkom wireless home phone

Hi, I am writing this complaint and bad service on behalf of my pensioner aunt. More than a month ago they were offered the new wireles home phone to replace the landline phone. More than a month has gone by and various phone to telkom, phone not still does not receive calls, can only make calls. we took phone to telkom kempton park at festival mall as was told by telkom to bring phone to check setup. Some settings was done at the shop, we tested phone at the shop and phone worked,was able to make and recieve calls from mobile phone. when arriving back home, we tried phoning the number and same problem again. phone doesnt ring or show any sign of a call being received. Travelled from boneareo park all the way there and back to have same problem? What is the problem with this phone. It was far better having the landline. Being pensioners, they need the phone to be working correctly. Are we going to have to travel back and fouth everytime and problem still not fixed? Anybody have a solution? Help!!!