Hi @Aghast-Senior, welcome to the community.
It can be very stressful when a service provider decides to stop offering its services such as Hellomobile has done for its mobile phone plans.
Hellomobile was a reseller of the Vodafone 4G network. Vodafone no longer exists as a separate entity as it has merged with TPG to create TPG Telecom. In effect Vodafone no longer exists and could be behind the decision by Hellomobile to cease offering mobile plans.
Finding and changing to an alternative mobile phone provider/reseller is relatively straight forward. The announcement by Hellomobile in relation to cessation of mobile plans provides an overview of what is needed. In simple terms, one finds a new mobile provider, makes an application with the new provider and as part of the process ask for the mobile number to be ported to the new provider.
It may seem daunting finding a new mobile phone provider, but there is information in the community which may be of assistance such as this existing thread:
Choice has also prepared an article on the 'Best SIM Only Plans:
Both the above links may be useful for to read and assist in your decision making.
It also appears that you are having difficulties with your Optus wireless modem. A suggestion may be if you have the NBN connected to your residence and this is where the laptop with the wireless dongle is most often used, look at using the local WIFI network within your dwelling.
If you travel occasionally and have a smart phone, most smart phone allow WIFI hotspots to be created so that non-mobile network connected devices can connect to the internet through the mobile network. Ability to use hotspots will be dependent on the data allowance for the mobile provider and also coverage of the mobile network provider.
If you have difficulties with transitioning from Hellomobile to another provider, Hellomobile indicated that they have a support team which existing customers can all for assistence (see cessation announcement).
Alternatively, if you have any specific questions or challenges, you are welcome to post additional messages below for community members to respond.
