VODACOM's Incompentence is absolutely unacceptable and downright ridiculous

Vodacom really does seem *********** to fix the same error over and over again. Every year that I deactivate sms roamer once I enter back into South Africa, I cannot send international sms (and sometimes national mms). Again, this year the same problem, just that this time it was even worse as once I activated sms roamer and arrived in Germany, I could not send an international sms at all, which meant that I could not sms my aunt once I arrived at Frankfurt airport as to where I was so we could meet for me to be fetched at the airport. I was able to send sms to +27 numbers and I was able to receive sms from anywhere, +27 and +49, but I WAS UNABLE TO SEND OUT ANY INTERNATIONAL SMS WITH ANY OTHER PREFIX +__. This is unacceptable and I am soooo tired of contacting Vodacom every time I arrive back from overseas and deactivate sms roamer. I tried to contact Vodacom via the website chat, but they were unable to assist me and re-synchronise my cell number, as my account is held by my business and I was told to phone ********** - great I was overseas and sms roamer was activated, which by the way, the Vodacom chat agent new and confirmed. I am still unable to send international sms from my cellphone even though I am back in SA. Can this persistent error and problem on Vodacom's part be fixed and sorted once and for all???? I do not want to contact Vodacom again next year when I go overseas.