Vodacom quick to sell but will turn their back on you

I took a vodacom contract with a mifi router all was going well till some debit thing went wrong and i was forced to make manual payments. As much as i asked for the debit order to reinstated it never was the account ended up in arrears and i never got round to a vodacom store hence making debit order so convenient. Now vodacom never called or nothing then i got a message to say my credit limit was affected , if someone was so kind they could've gotten into contact and i could've make an arrangement since that they no one called.