How is it better to send data using Dapper in c# to PL/SQL scripts variables of RECORD type

I have a PL/SQL procedure that using 3 variables of RECORD type as parameters, which i have to fill with my data (from c# application) to execute a procedure.

1st i've tried to build the same structure with this records via c# and pass as a parameter via Dapper, but it's not working since dapper works only with scalar data types.

Then i've tried to pass my data as arrays and to map them inside the procedure, but RECORD type can't accept sets of data like a.NAME := ('aaaaaa','sdasd'); it works only this way:

a.NAME(1) := 'aaaaaa';
a.NAME(2) := 'sdasd';

The only thing that i have on my mind now is to generate such strings in the procedure text, but i'm feeling like there should be a better way. What am doing wrong?

P.S. i can't change the script that needs to be running after all, so i can't change the data type it accepts.

Update: To make it easier, let's say, i've decided to make an example:

We have 2 custom types

TYPE A_REC IS RECORD (NAME dbms_sql.Varchar2_Table);
TYPE B_REC IS RECORD (NAME dbms_sql.Varchar2_Table
                         , ID dbms_sql.Number_Table);

and a procedure, which might be used something like

declare
a c_pck.a_rec;
b c_pck.b_rec;
begin

a.NAME(1) := 'aaaaa';
b.NAME(1) := 'sssss';
b.NAME(2) := 'ddddd';
b.ID(1) := 111;
b.ID(2) := 222;


c_pck.pr(a => a, b => b);
end;

How can i run this procedure via Dapper?