I can't connect my phone automatically to the internet. Also can't connect it at all,

My Doogee blade 20 will not connect to the Lebara internet automatically because the APN is not correct.
I believe the problem is because the APN type in the settings puts a space between (default, supl), when it should be (default,supl). The Labara network will not accept it with the space, and I cannot find out how to change it.
I have also sent this to customer support in Beijing.
Thanks