Hi I was hoping someone can help me.

Im trying to write an apex class test for my test class.
 

public class RenewalOpp_SavingsToDate {
        Id OpptyId = apexpages.currentpage().getparameters().get('id');
    	Id AcctId = [SELECT AccountId FROM Opportunity WHERE Id =: OpptyId LIMIT 1].Id;
    	Decimal SToD = [SELECT Savings_To_Data_ABS__c FROM Contact WHERE AccountId =: AcctId AND Do_The_Maths_Added__c = TRUE LIMIT 1].Savings_To_Data_ABS__c;
    	public Decimal Savings { get; set; }
        public RenewalOpp_SavingsToDate() {
            Savings = [SELECT Savings_To_Data_ABS__c FROM Contact WHERE AccountId =: AcctId AND Do_The_Maths_Added__c = TRUE LIMIT 1].Savings_To_Data_ABS__c;
        }
    
    List<Account> Acct;
    public List <Account> getAcct(){
      Acct = [SELECT id FROM Account WHERE id =: AcctId];
      return Acct;
    }   
    List<Contact> Cont;
    public List <Contact> getCont(){
      Cont = [SELECT id FROM Contact WHERE AccountId =: AcctId AND Do_The_Maths_Added__c = TRUE LIMIT 1];
      return Cont;
    }    
    

}

When i am trying to test it with the test class below all i get is List has no rows for assignment

@istest(SeeAllData=false)
public class RenewalOpp_SavingsToDate_Test {

  static testMethod void testSetUp() {
     
  Account acc = new Account();
  acc.Name = 'Test';
  acc.Type = 'Customer';
  insert acc;
      
  Contact con = new Contact();
  con.LastName='Test01';
  con.Email='Test01@Test01.com';
  con.Phone='0234 123456';
  con.AccountId=acc.Id;
  con.Do_The_Maths_Added__c = TRUE; 
  insert con;
      
  Opportunity opp = new Opportunity();
  opp.Name = 'Test';
  opp.StageName = 'Not closed';
  opp.CloseDate = Date.Today();
  opp.AccountId = acc.id;
  opp.Type = 'New Business';
  opp.Opp_Enquiry_Source__c = 'Test';
  opp.User__c = UserInfo.GetUserId();
  opp.OwnerId = opp.User__c;
  insert opp;
      
  Order__c o = new Order__C();
  o.Proposal_Reference__c = opp.Id;
  o.Number_of_Units__c = 1.0;
  o.Contract_Start_date__c = Date.Today();
  o.Contract_End_date__c = Date.Today();
  o.Company_Name__c = acc.Id;
  insert o;
      
  Id OpptyId = opp.Id;
      
  //instance of class
  RenewalOpp_SavingsToDate ins = new RenewalOpp_SavingsToDate();
  List <Account>caseList = ins.getAcct();
  List <Contact>caseList2 = ins.getCont();

  // assert
  System.assertEquals(1, caseList.size());
  System.assertEquals(1, caseList2.size());
  }
    
}

I dont understand why it is returning the no rows when ive just created them in the test class.