Telkom Mobile Bad

Telkom mobile used mtn for roaming had no problems.Since they changed to vodacom 1st July its a disaster.I have bad signal all over if any did all the settings like they instructed phoned in a number of times to call center 180 with same explanation and instruction network scan automatic etc etc! Shows telkom-r and telkom sa as provider with very low if any signal although on my wifes vodacom phone she has full signal from vodacom so where is the roaming bull **** telkom?